Vulnerability-Lookup

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CVE-2026-46598 (GCVE-0-2026-46598)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:14

Title

Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent

Summary

For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a panic when used.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-129 - Improper Validation of Array Index

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79596
https://go.dev/cl/781360
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5033

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/agent	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-46598",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:12:30.585638Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-129",
                "description": "CWE-129 Improper Validation of Array Index",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T18:14:37.255Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/agent",
          "product": "golang.org/x/crypto/ssh/agent",
          "programRoutines": [
            {
              "name": "parseEd25519Cert"
            },
            {
              "name": "parseEd25519Key"
            },
            {
              "name": "ForwardToAgent"
            },
            {
              "name": "ServeAgent"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "For certain crafted inputs, a \u0027ed25519.PrivateKey\u0027 was created by casting malformed wire bytes, leading to a panic when used."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-129: Improper Validation of Array Index",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:27.986Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79596"
        },
        {
          "url": "https://go.dev/cl/781360"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5033"
        }
      ],
      "title": "Invoking  pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-46598",
    "datePublished": "2026-05-22T02:31:27.986Z",
    "dateReserved": "2026-05-15T17:35:00.813Z",
    "dateUpdated": "2026-05-22T18:14:37.255Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-46597 (GCVE-0-2026-46597)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 14:08

Title

Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh

Summary

An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79561
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781620
https://pkg.go.dev/vuln/GO-2026-5013

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

Maciej Kawka

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-46597",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T14:08:24.589026Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T14:08:27.674Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "gcmCipher.readCipherPacket"
            },
            {
              "name": "Dial"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
            },
            {
              "name": "curve25519sha256.Client"
            },
            {
              "name": "curve25519sha256.Server"
            },
            {
              "name": "dhGEXSHA.Client"
            },
            {
              "name": "dhGEXSHA.Server"
            },
            {
              "name": "dhGroup.Client"
            },
            {
              "name": "dhGroup.Server"
            },
            {
              "name": "ecdh.Client"
            },
            {
              "name": "ecdh.Server"
            },
            {
              "name": "mlkem768WithCurve25519sha256.Client"
            },
            {
              "name": "mlkem768WithCurve25519sha256.Server"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Maciej Kawka"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-191: Integer Underflow (Wrap or Wraparound)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:26.754Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79561"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://go.dev/cl/781620"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5013"
        }
      ],
      "title": "Invoking  byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-46597",
    "datePublished": "2026-05-22T02:31:26.754Z",
    "dateReserved": "2026-05-15T17:35:00.813Z",
    "dateUpdated": "2026-05-22T14:08:27.674Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-46595 (GCVE-0-2026-46595)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:21

Title

Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh

Summary

Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.

Severity

10 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-863 - Incorrect Authorization

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79570
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781642
https://pkg.go.dev/vuln/GO-2026-5023

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 10,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-46595",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:21:12.222019Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-863",
                "description": "CWE-863 Incorrect Authorization",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T18:21:43.315Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "connection.serverAuthenticate"
            },
            {
              "name": "NewServerConn"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:27.894Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79570"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://go.dev/cl/781642"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5023"
        }
      ],
      "title": "Invoking  VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-46595",
    "datePublished": "2026-05-22T02:31:27.894Z",
    "dateReserved": "2026-05-15T17:35:00.813Z",
    "dateUpdated": "2026-05-22T18:21:43.315Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-42508 (GCVE-0-2026-42508)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:44

Title

Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts

Summary

Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-295 - Improper Certificate Validation

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79568
https://go.dev/cl/781220
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5021

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/knownhosts	Affected: 0 , < 0.52.0 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-42508",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:43:40.584666Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T18:44:33.483Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/knownhosts",
          "product": "golang.org/x/crypto/ssh/knownhosts",
          "programRoutines": [
            {
              "name": "hostKeyDB.IsRevoked"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Previously, a revoked \u0027SignatureKey\u0027 belonging to a CA was not correctly checked for revocation. Now, both the \u0027key\u0027 and \u0027key.SignatureKey\u0027 are checked for @revoked."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-295: Improper Certificate Validation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:27.644Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79568"
        },
        {
          "url": "https://go.dev/cl/781220"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5021"
        }
      ],
      "title": "Invoking  auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-42508",
    "datePublished": "2026-05-22T02:31:27.644Z",
    "dateReserved": "2026-04-28T00:21:12.792Z",
    "dateUpdated": "2026-05-22T18:44:33.483Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-39835 (GCVE-0-2026-39835)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 17:45

Title

Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh

Summary

SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79563
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781660
https://pkg.go.dev/vuln/GO-2026-5015

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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            }
          },
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "CertChecker.CheckHostKey"
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            {
              "name": "CertChecker.Authenticate"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
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              "lessThan": "0.52.0",
              "status": "affected",
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          ]
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      "credits": [
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          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:26.982Z",
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        },
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          "url": "https://go.dev/cl/781660"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5015"
        }
      ],
      "title": "Invoking  server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
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}

CVE-2026-39834 (GCVE-0-2026-39834)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:50

Title

Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh

Summary

When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79567
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781663
https://pkg.go.dev/vuln/GO-2026-5020

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "metrics": [
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
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          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "defaultStatus": "unaffected",
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            {
              "name": "channel.WriteExtended"
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              "name": "Dial"
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              "name": "NewClientConn"
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              "name": "NewServerConn"
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              "name": "Session.CombinedOutput"
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              "name": "Session.Run"
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              "name": "Session.Shell"
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              "name": "dhGEXSHA.Server"
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            },
            {
              "name": "ecdh.Server"
            },
            {
              "name": "extChannel.Write"
            },
            {
              "name": "mlkem768WithCurve25519sha256.Client"
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              "name": "mlkem768WithCurve25519sha256.Server"
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        }
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          "url": "https://pkg.go.dev/vuln/GO-2026-5020"
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      "title": "Invoking  infinite loop on large channel writes in golang.org/x/crypto/ssh"
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}

CVE-2026-39833 (GCVE-0-2026-39833)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:58

Title

Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent

Summary

The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-358 - Improperly Implemented Security Check for Standard

Assigner

Go

References

5 references

URL	Tags
https://go.dev/issue/79436
https://go.dev/cl/778640
https://go.dev/cl/778641
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5005

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/agent	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
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              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39833",
                "options": [
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                    "Exploitation": "none"
                  },
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                  },
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                    "Technical Impact": "total"
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                "timestamp": "2026-05-22T18:57:41.103317Z",
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          "dateUpdated": "2026-05-22T18:58:08.489Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/agent",
          "product": "golang.org/x/crypto/ssh/agent",
          "programRoutines": [
            {
              "name": "keyring.Add"
            }
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        }
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        }
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      ],
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        },
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          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
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        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5005"
        }
      ],
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}

CVE-2026-39832 (GCVE-0-2026-39832)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 19:03

Title

Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent

Summary

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-281 - Improper Preservation of Permissions

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79435
https://go.dev/cl/778642
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5006

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/agent	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
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                "id": "CVE-2026-39832",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "defaultStatus": "unaffected",
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              "name": "client.Add"
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        }
      ],
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          "descriptions": [
            {
              "description": "CWE-281: Improper Preservation of Permissions",
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      "providerMetadata": {
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        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5006"
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}

CVE-2026-39831 (GCVE-0-2026-39831)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:52

Title

Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh

Summary

The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79566
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781662
https://pkg.go.dev/vuln/GO-2026-5019

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39831",
                "options": [
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                    "Exploitation": "none"
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                  },
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                    "Technical Impact": "total"
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "collectionURL": "https://pkg.go.dev",
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          "programRoutines": [
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              "name": "CertChecker.CheckCert"
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            {
              "name": "skECDSAPublicKey.Verify"
            },
            {
              "name": "skEd25519PublicKey.Verify"
            },
            {
              "name": "connection.serverAuthenticate"
            },
            {
              "name": "CertChecker.Authenticate"
            },
            {
              "name": "CertChecker.CheckHostKey"
            },
            {
              "name": "Certificate.Verify"
            },
            {
              "name": "Dial"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a \"no-touch-required\" extension in Permissions.Extensions from PublicKeyCallback."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-290: Authentication Bypass by Spoofing",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:27.436Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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          "url": "https://go.dev/issue/79566"
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        },
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          "url": "https://go.dev/cl/781662"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5019"
        }
      ],
      "title": "Invoking  bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "dateReserved": "2026-04-07T18:13:03.528Z",
    "dateUpdated": "2026-05-22T18:52:08.344Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-39830 (GCVE-0-2026-39830)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:54

Title

Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh

Summary

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-833 - Deadlock

Assigner

Go

References

5 references

URL	Tags
https://go.dev/issue/79564
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781640
https://go.dev/cl/781664
https://pkg.go.dev/vuln/GO-2026-5017

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
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              "attackVector": "NETWORK",
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                "id": "CVE-2026-39830",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
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            {
              "name": "mux.SendRequest"
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              "name": "Session.Run"
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              "name": "Session.SendRequest"
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              "name": "Session.Setenv"
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              "name": "Session.Shell"
            },
            {
              "name": "Session.Signal"
            },
            {
              "name": "Session.Start"
            },
            {
              "name": "Session.WindowChange"
            },
            {
              "name": "tcpListener.Close"
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              "name": "unixListener.Close"
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          "versions": [
            {
              "lessThan": "0.52.0",
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              "version": "0",
              "versionType": "semver"
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          ]
        }
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          "lang": "en",
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        }
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          "value": "A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection\u0027s read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded."
        }
      ],
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        {
          "descriptions": [
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        },
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          "url": "https://go.dev/cl/781640"
        },
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          "url": "https://go.dev/cl/781664"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5017"
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      ],
      "title": "Invoking  client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
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}

CVE-2026-39829 (GCVE-0-2026-39829)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:53

Title

Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh

Summary

The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1176 - Inefficient CPU Computation

Assigner

Go

References

5 references

URL	Tags
https://go.dev/issue/79565
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781641
https://go.dev/cl/781661
https://pkg.go.dev/vuln/GO-2026-5018

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "baseScore": 7.5,
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              "confidentialityImpact": "NONE",
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:52:38.155082Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
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              "name": "parseRSA"
            },
            {
              "name": "checkDSAParams"
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              "name": "Dial"
            },
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              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
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              "name": "NewSignerFromKey"
            },
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              "name": "ParseAuthorizedKey"
            },
            {
              "name": "ParseKnownHosts"
            },
            {
              "name": "ParsePrivateKey"
            },
            {
              "name": "ParsePrivateKeyWithPassphrase"
            },
            {
              "name": "ParsePublicKey"
            },
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              "name": "ParseRawPrivateKey"
            },
            {
              "name": "ParseRawPrivateKeyWithPassphrase"
            }
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              "status": "affected",
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        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
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        }
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        {
          "descriptions": [
            {
              "description": "CWE-1176: Inefficient CPU Computation",
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        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5018"
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}

CVE-2026-39828 (GCVE-0-2026-39828)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 17:44

Title

Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh

Summary

When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.

Severity

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-863 - Incorrect Authorization

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79562
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781621
https://pkg.go.dev/vuln/GO-2026-5014

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 6.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
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              "content": {
                "id": "CVE-2026-39828",
                "options": [
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                    "Exploitation": "none"
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                    "Technical Impact": "partial"
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        ],
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          "dateUpdated": "2026-05-22T17:44:19.986Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "connection.serverAuthenticate"
            },
            {
              "name": "NewServerConn"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
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              "versionType": "semver"
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      "credits": [
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          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
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          "lang": "en",
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        }
      ],
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        {
          "descriptions": [
            {
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en"
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      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:26.883Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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        },
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        },
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          "url": "https://go.dev/cl/781621"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5014"
        }
      ],
      "title": "Invoking  bypass of certificate restrictions in golang.org/x/crypto/ssh"
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}

CVE-2026-39827 (GCVE-0-2026-39827)

Vulnerability from nvd – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:35

Title

Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh

Summary

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/35127
https://go.dev/cl/781320
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5016

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

Ziyan Zhou

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
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                "id": "CVE-2026-39827",
                "options": [
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:35:34.770589Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T18:35:40.472Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "channel.Reject"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Ziyan Zhou"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection\u0027s internal state and released for garbage collection."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-401: Missing Release of Memory after Effective Lifetime",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:27.064Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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          "url": "https://go.dev/issue/35127"
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        {
          "url": "https://go.dev/cl/781320"
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          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5016"
        }
      ],
      "title": "Invoking  memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "dateReserved": "2026-04-07T18:13:03.528Z",
    "dateUpdated": "2026-05-22T18:35:40.472Z",
    "state": "PUBLISHED"
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}

CVE-2025-47914 (GCVE-0-2025-47914)

Vulnerability from nvd – Published: 2025-11-19 20:33 – Updated: 2025-11-20 17:15

Title

Malformed constraint may cause denial of service in golang.org/x/crypto/ssh/agent

Summary

SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-237
CWE-125 - Out-of-bounds Read

Assigner

Go

References

4 references

URL	Tags
https://groups.google.com/g/golang-announce/c/w-o…
https://go.dev/cl/721960
https://go.dev/issue/76364
https://pkg.go.dev/vuln/GO-2025-4135

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/agent	Affected: 0 , < 0.45.0 (semver)

Credits

Jakub Ciolek

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
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              "content": {
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        "providerMetadata": {
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/agent",
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              "name": "parseConstraints"
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            }
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          "value": "Jakub Ciolek"
        }
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        }
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          "descriptions": [
            {
              "description": "CWE-237",
              "lang": "en"
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          "url": "https://go.dev/issue/76364"
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        {
          "url": "https://pkg.go.dev/vuln/GO-2025-4135"
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      "title": "Malformed constraint may cause denial of service in golang.org/x/crypto/ssh/agent"
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}

CVE-2025-58181 (GCVE-0-2025-58181)

Vulnerability from nvd – Published: 2025-11-19 20:33 – Updated: 2025-11-20 17:14

Title

Unbounded memory consumption in golang.org/x/crypto/ssh

Summary

SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1284
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go

References

4 references

URL	Tags
https://groups.google.com/g/golang-announce/c/w-o…
https://go.dev/cl/721961
https://go.dev/issue/76363
https://pkg.go.dev/vuln/GO-2025-4134

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.45.0 (semver)

Credits

Jakub Ciolek

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
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              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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            }
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                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-11-19T20:49:26.800Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
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          "programRoutines": [
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              "name": "parseGSSAPIPayload"
            },
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              "name": "NewServerConn"
            }
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              "status": "affected",
              "version": "0",
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          "lang": "en",
          "value": "Jakub Ciolek"
        }
      ],
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          "lang": "en",
          "value": "SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-1284",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-20T17:14:59.856Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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          "url": "https://go.dev/cl/721961"
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          "url": "https://go.dev/issue/76363"
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          "url": "https://pkg.go.dev/vuln/GO-2025-4134"
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      "title": "Unbounded memory consumption in golang.org/x/crypto/ssh"
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CVE-2026-46598 (GCVE-0-2026-46598)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:14

Title

Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent

Summary

For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a panic when used.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-129 - Improper Validation of Array Index

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79596
https://go.dev/cl/781360
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5033

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/agent	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
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              "content": {
                "id": "CVE-2026-46598",
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        "providerMetadata": {
          "dateUpdated": "2026-05-22T18:14:37.255Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/agent",
          "product": "golang.org/x/crypto/ssh/agent",
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              "name": "parseEd25519Cert"
            },
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              "name": "parseEd25519Key"
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            },
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              "name": "ServeAgent"
            }
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        }
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          "descriptions": [
            {
              "description": "CWE-129: Improper Validation of Array Index",
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        "dateUpdated": "2026-05-22T02:31:27.986Z",
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        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5033"
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      ],
      "title": "Invoking  pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent"
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}

CVE-2026-46595 (GCVE-0-2026-46595)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:21

Title

Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh

Summary

Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.

Severity

10 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-863 - Incorrect Authorization

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79570
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781642
https://pkg.go.dev/vuln/GO-2026-5023

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "scope": "CHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L",
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            }
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          "dateUpdated": "2026-05-22T18:21:43.315Z",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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        },
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          "url": "https://go.dev/cl/781642"
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          "url": "https://pkg.go.dev/vuln/GO-2026-5023"
        }
      ],
      "title": "Invoking  VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-46595",
    "datePublished": "2026-05-22T02:31:27.894Z",
    "dateReserved": "2026-05-15T17:35:00.813Z",
    "dateUpdated": "2026-05-22T18:21:43.315Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-42508 (GCVE-0-2026-42508)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:44

Title

Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts

Summary

Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-295 - Improper Certificate Validation

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79568
https://go.dev/cl/781220
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5021

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/knownhosts	Affected: 0 , < 0.52.0 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/knownhosts",
          "product": "golang.org/x/crypto/ssh/knownhosts",
          "programRoutines": [
            {
              "name": "hostKeyDB.IsRevoked"
            }
          ],
          "vendor": "golang.org/x/crypto",
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            {
              "lessThan": "0.52.0",
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          ]
        }
      ],
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        }
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        "dateUpdated": "2026-05-22T02:31:27.644Z",
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          "url": "https://go.dev/cl/781220"
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        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5021"
        }
      ],
      "title": "Invoking  auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts"
    }
  },
  "cveMetadata": {
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    "dateReserved": "2026-04-28T00:21:12.792Z",
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}

CVE-2026-39834 (GCVE-0-2026-39834)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:50

Title

Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh

Summary

When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-190 - Integer Overflow or Wraparound

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79567
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781663
https://pkg.go.dev/vuln/GO-2026-5020

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
              "version": "3.1"
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              "content": {
                "id": "CVE-2026-39834",
                "options": [
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                    "Exploitation": "none"
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                    "Technical Impact": "partial"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
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          "programRoutines": [
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              "name": "channel.WriteExtended"
            },
            {
              "name": "Dial"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
            },
            {
              "name": "Session.CombinedOutput"
            },
            {
              "name": "Session.Output"
            },
            {
              "name": "Session.Run"
            },
            {
              "name": "Session.Shell"
            },
            {
              "name": "Session.Start"
            },
            {
              "name": "channel.Write"
            },
            {
              "name": "curve25519sha256.Client"
            },
            {
              "name": "curve25519sha256.Server"
            },
            {
              "name": "dhGEXSHA.Client"
            },
            {
              "name": "dhGEXSHA.Server"
            },
            {
              "name": "dhGroup.Client"
            },
            {
              "name": "dhGroup.Server"
            },
            {
              "name": "ecdh.Client"
            },
            {
              "name": "ecdh.Server"
            },
            {
              "name": "extChannel.Write"
            },
            {
              "name": "mlkem768WithCurve25519sha256.Client"
            },
            {
              "name": "mlkem768WithCurve25519sha256.Server"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
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        {
          "lang": "en",
          "value": "When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the internal payload size calculation caused the write loop to spin indefinitely, sending empty packets without making progress. The size comparison now uses int64 to prevent truncation."
        }
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      "problemTypes": [
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          "descriptions": [
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        "dateUpdated": "2026-05-22T02:31:27.540Z",
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          "url": "https://go.dev/cl/781663"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5020"
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      ],
      "title": "Invoking  infinite loop on large channel writes in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
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    "dateReserved": "2026-04-07T18:13:03.529Z",
    "dateUpdated": "2026-05-22T18:50:51.339Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-39831 (GCVE-0-2026-39831)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:52

Title

Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh

Summary

The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-290 - Authentication Bypass by Spoofing

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79566
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781662
https://pkg.go.dev/vuln/GO-2026-5019

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
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              "content": {
                "id": "CVE-2026-39831",
                "options": [
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                    "Exploitation": "none"
                  },
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                  },
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                    "Technical Impact": "total"
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:51:41.233749Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
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          "programRoutines": [
            {
              "name": "CertChecker.CheckCert"
            },
            {
              "name": "skECDSAPublicKey.Verify"
            },
            {
              "name": "skEd25519PublicKey.Verify"
            },
            {
              "name": "connection.serverAuthenticate"
            },
            {
              "name": "CertChecker.Authenticate"
            },
            {
              "name": "CertChecker.CheckHostKey"
            },
            {
              "name": "Certificate.Verify"
            },
            {
              "name": "Dial"
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            },
            {
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        }
      ],
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        {
          "descriptions": [
            {
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}

CVE-2026-39829 (GCVE-0-2026-39829)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:53

Title

Invoking pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh

Summary

The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1176 - Inefficient CPU Computation

Assigner

Go

References

5 references

URL	Tags
https://go.dev/issue/79565
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781641
https://go.dev/cl/781661
https://pkg.go.dev/vuln/GO-2026-5018

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
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              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
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              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
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          "programRoutines": [
            {
              "name": "parseRSA"
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            {
              "name": "checkDSAParams"
            },
            {
              "name": "parseDSA"
            },
            {
              "name": "Dial"
            },
            {
              "name": "NewClientConn"
            },
            {
              "name": "NewServerConn"
            },
            {
              "name": "NewSignerFromKey"
            },
            {
              "name": "ParseAuthorizedKey"
            },
            {
              "name": "ParseKnownHosts"
            },
            {
              "name": "ParsePrivateKey"
            },
            {
              "name": "ParsePrivateKeyWithPassphrase"
            },
            {
              "name": "ParsePublicKey"
            },
            {
              "name": "ParseRawPrivateKey"
            },
            {
              "name": "ParseRawPrivateKeyWithPassphrase"
            }
          ],
          "vendor": "golang.org/x/crypto",
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              "status": "affected",
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      ],
      "credits": [
        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
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          "lang": "en",
          "value": "The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during signature verification. This could be triggered by unauthenticated clients during public key authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-1176: Inefficient CPU Computation",
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            }
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      ],
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        },
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          "url": "https://go.dev/cl/781641"
        },
        {
          "url": "https://go.dev/cl/781661"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5018"
        }
      ],
      "title": "Invoking  pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "cveId": "CVE-2026-39829",
    "datePublished": "2026-05-22T02:31:27.324Z",
    "dateReserved": "2026-04-07T18:13:03.528Z",
    "dateUpdated": "2026-05-22T18:53:33.377Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-39830 (GCVE-0-2026-39830)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:54

Title

Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh

Summary

A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-833 - Deadlock

Assigner

Go

References

5 references

URL	Tags
https://go.dev/issue/79564
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781640
https://go.dev/cl/781664
https://pkg.go.dev/vuln/GO-2026-5017

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
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              "userInteraction": "NONE",
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                "id": "CVE-2026-39830",
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        },
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          "defaultStatus": "unaffected",
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          "programRoutines": [
            {
              "name": "mux.SendRequest"
            },
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              "name": "mux.handleGlobalPacket"
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              "name": "channel.handlePacket"
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              "name": "channel.SendRequest"
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              "name": "Session.RequestPty"
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              "name": "Session.Run"
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            {
              "name": "Session.Setenv"
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              "name": "Session.Shell"
            },
            {
              "name": "Session.Signal"
            },
            {
              "name": "Session.Start"
            },
            {
              "name": "Session.WindowChange"
            },
            {
              "name": "tcpListener.Close"
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              "name": "unixListener.Close"
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          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
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          ]
        }
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      "credits": [
        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
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          "lang": "en",
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        }
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              "description": "CWE-833: Deadlock",
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          "url": "https://go.dev/cl/781640"
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          "url": "https://go.dev/cl/781664"
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          "url": "https://pkg.go.dev/vuln/GO-2026-5017"
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      "title": "Invoking  client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh"
    }
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  "cveMetadata": {
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    "dateReserved": "2026-04-07T18:13:03.528Z",
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}

CVE-2026-39827 (GCVE-0-2026-39827)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:35

Title

Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh

Summary

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.

Severity

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/35127
https://go.dev/cl/781320
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5016

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

Ziyan Zhou

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 6.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
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                "id": "CVE-2026-39827",
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                    "Technical Impact": "partial"
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                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T18:35:40.472Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "channel.Reject"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
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              "status": "affected",
              "version": "0",
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      ],
      "credits": [
        {
          "lang": "en",
          "value": "Ziyan Zhou"
        }
      ],
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        }
      ],
      "problemTypes": [
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      ],
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        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5016"
        }
      ],
      "title": "Invoking  memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh"
    }
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}

CVE-2026-39835 (GCVE-0-2026-39835)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 17:45

Title

Invoking server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh

Summary

SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79563
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781660
https://pkg.go.dev/vuln/GO-2026-5015

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39835",
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                    "Exploitation": "none"
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        "providerMetadata": {
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        },
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      }
    ],
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          "collectionURL": "https://pkg.go.dev",
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          "programRoutines": [
            {
              "name": "CertChecker.CheckHostKey"
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              "name": "CertChecker.Authenticate"
            }
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          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
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        }
      ],
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        {
          "descriptions": [
            {
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:26.982Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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          "url": "https://go.dev/issue/79563"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://go.dev/cl/781660"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5015"
        }
      ],
      "title": "Invoking  server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh"
    }
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  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "dateReserved": "2026-04-07T18:13:03.529Z",
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}

CVE-2026-39828 (GCVE-0-2026-39828)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 17:44

Title

Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh

Summary

When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.

Severity

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-863 - Incorrect Authorization

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79562
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781621
https://pkg.go.dev/vuln/GO-2026-5014

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 6.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
            }
          },
          {
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                "id": "CVE-2026-39828",
                "options": [
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                    "Exploitation": "none"
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                    "Technical Impact": "partial"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
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          "programRoutines": [
            {
              "name": "connection.serverAuthenticate"
            },
            {
              "name": "NewServerConn"
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          "versions": [
            {
              "lessThan": "0.52.0",
              "status": "affected",
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        }
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      "credits": [
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          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
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        }
      ],
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          "descriptions": [
            {
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:26.883Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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        {
          "url": "https://go.dev/issue/79562"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://go.dev/cl/781621"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5014"
        }
      ],
      "title": "Invoking  bypass of certificate restrictions in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "datePublished": "2026-05-22T02:31:26.883Z",
    "dateReserved": "2026-04-07T18:13:03.528Z",
    "dateUpdated": "2026-05-22T17:44:19.986Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-46597 (GCVE-0-2026-46597)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 14:08

Title

Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh

Summary

An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79561
https://groups.google.com/g/golang-announce/c/a08…
https://go.dev/cl/781620
https://pkg.go.dev/vuln/GO-2026-5013

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.52.0 (semver)

Credits

Maciej Kawka

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
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              "confidentialityImpact": "NONE",
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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            {
              "name": "NewServerConn"
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              "name": "curve25519sha256.Client"
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            {
              "name": "curve25519sha256.Server"
            },
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              "name": "dhGEXSHA.Client"
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            {
              "name": "dhGEXSHA.Server"
            },
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              "name": "dhGroup.Client"
            },
            {
              "name": "dhGroup.Server"
            },
            {
              "name": "ecdh.Client"
            },
            {
              "name": "ecdh.Server"
            },
            {
              "name": "mlkem768WithCurve25519sha256.Client"
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            {
              "name": "mlkem768WithCurve25519sha256.Server"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Maciej Kawka"
        }
      ],
      "descriptions": [
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          "lang": "en",
          "value": "An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-191: Integer Underflow (Wrap or Wraparound)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
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        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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        },
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          "url": "https://go.dev/cl/781620"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5013"
        }
      ],
      "title": "Invoking  byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "dateUpdated": "2026-05-22T14:08:27.674Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-39832 (GCVE-0-2026-39832)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 19:03

Title

Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent

Summary

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-281 - Improper Preservation of Permissions

Assigner

Go

References

4 references

URL	Tags
https://go.dev/issue/79435
https://go.dev/cl/778642
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5006

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/agent	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39832",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
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                    "Technical Impact": "total"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:59:53.174504Z",
                "version": "2.0.3"
              },
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T19:03:06.882Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/agent",
          "product": "golang.org/x/crypto/ssh/agent",
          "programRoutines": [
            {
              "name": "client.Add"
            },
            {
              "name": "keyring.Add"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
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              "lessThan": "0.52.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
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      "credits": [
        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
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          "lang": "en",
          "value": "When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "lang": "en"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:26.660Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
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          "url": "https://go.dev/issue/79435"
        },
        {
          "url": "https://go.dev/cl/778642"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5006"
        }
      ],
      "title": "Invoking  agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
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    "cveId": "CVE-2026-39832",
    "datePublished": "2026-05-22T02:31:26.660Z",
    "dateReserved": "2026-04-07T18:13:03.529Z",
    "dateUpdated": "2026-05-22T19:03:06.882Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-39833 (GCVE-0-2026-39833)

Vulnerability from cvelistv5 – Published: 2026-05-22 02:31 – Updated: 2026-05-22 18:58

Title

Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent

Summary

The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-358 - Improperly Implemented Security Check for Standard

Assigner

Go

References

5 references

URL	Tags
https://go.dev/issue/79436
https://go.dev/cl/778640
https://go.dev/cl/778641
https://groups.google.com/g/golang-announce/c/a08…
https://pkg.go.dev/vuln/GO-2026-5005

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/agent	Affected: 0 , < 0.52.0 (semver)

Credits

NCC Group Cryptography Services, sponsored by Teleport

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-39833",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T18:57:41.103317Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T18:58:08.489Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/agent",
          "product": "golang.org/x/crypto/ssh/agent",
          "programRoutines": [
            {
              "name": "keyring.Add"
            }
          ],
          "vendor": "golang.org/x/crypto",
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              "status": "affected",
              "version": "0",
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            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "NCC Group Cryptography Services, sponsored by Teleport"
        }
      ],
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          "lang": "en",
          "value": "The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "description": "CWE-358: Improperly Implemented Security Check for Standard",
              "lang": "en"
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T02:31:26.294Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
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          "url": "https://go.dev/issue/79436"
        },
        {
          "url": "https://go.dev/cl/778640"
        },
        {
          "url": "https://go.dev/cl/778641"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5005"
        }
      ],
      "title": "Invoking  key constraints not enforced in golang.org/x/crypto/ssh/agent"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Go",
    "cveId": "CVE-2026-39833",
    "datePublished": "2026-05-22T02:31:26.294Z",
    "dateReserved": "2026-04-07T18:13:03.529Z",
    "dateUpdated": "2026-05-22T18:58:08.489Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2025-47914 (GCVE-0-2025-47914)

Vulnerability from cvelistv5 – Published: 2025-11-19 20:33 – Updated: 2025-11-20 17:15

Title

Malformed constraint may cause denial of service in golang.org/x/crypto/ssh/agent

Summary

SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-237
CWE-125 - Out-of-bounds Read

Assigner

Go

References

4 references

URL	Tags
https://groups.google.com/g/golang-announce/c/w-o…
https://go.dev/cl/721960
https://go.dev/issue/76364
https://pkg.go.dev/vuln/GO-2025-4135

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh/agent	Affected: 0 , < 0.45.0 (semver)

Credits

Jakub Ciolek

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-47914",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-11-19T20:50:27.263405Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-11-19T20:50:30.968Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh/agent",
          "product": "golang.org/x/crypto/ssh/agent",
          "programRoutines": [
            {
              "name": "parseConstraints"
            },
            {
              "name": "ForwardToAgent"
            },
            {
              "name": "ServeAgent"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.45.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jakub Ciolek"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-237",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-20T17:15:00.344Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
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          "url": "https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA"
        },
        {
          "url": "https://go.dev/cl/721960"
        },
        {
          "url": "https://go.dev/issue/76364"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2025-4135"
        }
      ],
      "title": "Malformed constraint may cause denial of service in golang.org/x/crypto/ssh/agent"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
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    "datePublished": "2025-11-19T20:33:43.126Z",
    "dateReserved": "2025-05-13T23:31:29.597Z",
    "dateUpdated": "2025-11-20T17:15:00.344Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-58181 (GCVE-0-2025-58181)

Vulnerability from cvelistv5 – Published: 2025-11-19 20:33 – Updated: 2025-11-20 17:14

Title

Unbounded memory consumption in golang.org/x/crypto/ssh

Summary

SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1284
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

Go

References

4 references

URL	Tags
https://groups.google.com/g/golang-announce/c/w-o…
https://go.dev/cl/721961
https://go.dev/issue/76363
https://pkg.go.dev/vuln/GO-2025-4134

Impacted products

1 product

Vendor	Product	Version
golang.org/x/crypto	golang.org/x/crypto/ssh	Affected: 0 , < 0.45.0 (semver)

Credits

Jakub Ciolek

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-58181",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-11-19T20:49:06.918113Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-770",
                "description": "CWE-770 Allocation of Resources Without Limits or Throttling",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-11-19T20:49:26.800Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/crypto/ssh",
          "product": "golang.org/x/crypto/ssh",
          "programRoutines": [
            {
              "name": "parseGSSAPIPayload"
            },
            {
              "name": "NewServerConn"
            }
          ],
          "vendor": "golang.org/x/crypto",
          "versions": [
            {
              "lessThan": "0.45.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Jakub Ciolek"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-1284",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-20T17:14:59.856Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://groups.google.com/g/golang-announce/c/w-oX3UxNcZA"
        },
        {
          "url": "https://go.dev/cl/721961"
        },
        {
          "url": "https://go.dev/issue/76363"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2025-4134"
        }
      ],
      "title": "Unbounded memory consumption in golang.org/x/crypto/ssh"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2025-58181",
    "datePublished": "2025-11-19T20:33:42.795Z",
    "dateReserved": "2025-08-27T14:50:58.691Z",
    "dateUpdated": "2025-11-20T17:14:59.856Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Find a vulnerability

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38 vulnerabilities by golang.org/x/crypto

CVE-2026-46598 (GCVE-0-2026-46598)

CVE-2026-46597 (GCVE-0-2026-46597)

CVE-2026-46595 (GCVE-0-2026-46595)

CVE-2026-42508 (GCVE-0-2026-42508)

CVE-2026-39835 (GCVE-0-2026-39835)

CVE-2026-39834 (GCVE-0-2026-39834)

CVE-2026-39833 (GCVE-0-2026-39833)

CVE-2026-39832 (GCVE-0-2026-39832)

CVE-2026-39831 (GCVE-0-2026-39831)

CVE-2026-39830 (GCVE-0-2026-39830)

CVE-2026-39829 (GCVE-0-2026-39829)

CVE-2026-39828 (GCVE-0-2026-39828)

CVE-2026-39827 (GCVE-0-2026-39827)

CVE-2025-47914 (GCVE-0-2025-47914)

CVE-2025-58181 (GCVE-0-2025-58181)

CVE-2026-46598 (GCVE-0-2026-46598)

CVE-2026-46595 (GCVE-0-2026-46595)

CVE-2026-42508 (GCVE-0-2026-42508)

CVE-2026-39834 (GCVE-0-2026-39834)

CVE-2026-39831 (GCVE-0-2026-39831)

CVE-2026-39829 (GCVE-0-2026-39829)

CVE-2026-39830 (GCVE-0-2026-39830)

CVE-2026-39827 (GCVE-0-2026-39827)

CVE-2026-39835 (GCVE-0-2026-39835)

CVE-2026-39828 (GCVE-0-2026-39828)

CVE-2026-46597 (GCVE-0-2026-46597)

CVE-2026-39832 (GCVE-0-2026-39832)

CVE-2026-39833 (GCVE-0-2026-39833)

CVE-2025-47914 (GCVE-0-2025-47914)

CVE-2025-58181 (GCVE-0-2025-58181)

Find a vulnerability

Search criteria ⓘ Use this form to refine search results. Full-text search supports keyword queries with ranking and filtering. You can combine vendor, product, and sources to narrow results. Enable “Apply ordering” to sort by date instead of relevance.

38 vulnerabilities by golang.org/x/crypto

CVE-2026-46598 (GCVE-0-2026-46598)

CVE-2026-46597 (GCVE-0-2026-46597)

CVE-2026-46595 (GCVE-0-2026-46595)

CVE-2026-42508 (GCVE-0-2026-42508)

CVE-2026-39835 (GCVE-0-2026-39835)

CVE-2026-39834 (GCVE-0-2026-39834)

CVE-2026-39833 (GCVE-0-2026-39833)

CVE-2026-39832 (GCVE-0-2026-39832)

CVE-2026-39831 (GCVE-0-2026-39831)

CVE-2026-39830 (GCVE-0-2026-39830)

CVE-2026-39829 (GCVE-0-2026-39829)

CVE-2026-39828 (GCVE-0-2026-39828)

CVE-2026-39827 (GCVE-0-2026-39827)

CVE-2025-47914 (GCVE-0-2025-47914)

CVE-2025-58181 (GCVE-0-2025-58181)

CVE-2026-46598 (GCVE-0-2026-46598)

CVE-2026-46595 (GCVE-0-2026-46595)

CVE-2026-42508 (GCVE-0-2026-42508)

CVE-2026-39834 (GCVE-0-2026-39834)

CVE-2026-39831 (GCVE-0-2026-39831)

CVE-2026-39829 (GCVE-0-2026-39829)

CVE-2026-39830 (GCVE-0-2026-39830)

CVE-2026-39827 (GCVE-0-2026-39827)

CVE-2026-39835 (GCVE-0-2026-39835)

CVE-2026-39828 (GCVE-0-2026-39828)

CVE-2026-46597 (GCVE-0-2026-46597)

CVE-2026-39832 (GCVE-0-2026-39832)

CVE-2026-39833 (GCVE-0-2026-39833)

CVE-2025-47914 (GCVE-0-2025-47914)

CVE-2025-58181 (GCVE-0-2025-58181)

Search criteria ⓘ Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.