Vulnerability-Lookup

GHSA-H3GM-Q7M7-MP28

Vulnerability from github – Published: 2026-06-03 00:30 – Updated: 2026-06-03 21:30

Details

When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged.

Severity

5.3 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-42507"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-02T23:16:38Z",
    "severity": "MODERATE"
  },
  "details": "When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged.",
  "id": "GHSA-h3gm-q7m7-mp28",
  "modified": "2026-06-03T21:30:28Z",
  "published": "2026-06-03T00:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42507"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/cl/777060"
    },
    {
      "type": "WEB",
      "url": "https://go.dev/issue/79346"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2026-5039"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-42507 (GCVE-0-2026-42507)

Vulnerability from cvelistv5 – Published: 2026-06-02 22:01 – Updated: 2026-06-03 19:04

Title

Arbitrary inputs are included in errors without any escaping in net/textproto

Summary

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-532 - Insertion of Sensitive Information into Log File

Assigner

References

4 references

URL	Tags
https://go.dev/issue/79346
https://go.dev/cl/777060
https://groups.google.com/g/golang-announce/c/tKs…
https://pkg.go.dev/vuln/GO-2026-5039

Impacted products

1 product

Vendor	Product	Version
Go standard library	net/textproto	Affected: 0 , < 1.25.11 (semver) Affected: 1.26.0-0 , < 1.26.4 (semver)

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-42507",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-03T19:04:08.223332Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-03T19:04:45.361Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/textproto",
          "product": "net/textproto",
          "programRoutines": [
            {
              "name": "parseCodeLine"
            },
            {
              "name": "Reader.ReadCodeLine"
            },
            {
              "name": "readMIMEHeader"
            },
            {
              "name": "Error.Error"
            },
            {
              "name": "Reader.ReadMIMEHeader"
            },
            {
              "name": "Reader.ReadResponse"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.25.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThan": "1.26.4",
              "status": "affected",
              "version": "1.26.0-0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-532: Insertion of Sensitive Information into Log File",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-02T22:01:37.307Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/79346"
        },
        {
          "url": "https://go.dev/cl/777060"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-5039"
        }
      ],
      "title": "Arbitrary inputs are included in errors without any escaping in net/textproto"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-42507",
    "datePublished": "2026-06-02T22:01:37.307Z",
    "dateReserved": "2026-04-28T00:21:12.792Z",
    "dateUpdated": "2026-06-03T19:04:45.361Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-H3GM-Q7M7-MP28

CVE-2026-42507 (GCVE-0-2026-42507)

Tags

Sightings

Nomenclature