Vulnerability-Lookup

CVE-2026-3230 (GCVE-0-2026-3230)

Vulnerability from cvelistv5 – Published: 2026-03-19 20:59 – Updated: 2026-03-20 17:09

Title

Improper key_share validation in TLS 1.3 HelloRetryRequest

Summary

Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client's authentication of the server during TLS handshakes.

Severity

1.2 (Low)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:Y/R:A/V:D/U:Clear

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-20 17:08 UTC

CWE

CWE-20 - Improper Input Validation Improper Input Validation

Assigner

wolfSSL icscert root Scorecard

References

1 reference

URL	Tags
https://github.com/wolfSSL/wolfssl/pull/9754

Impacted products

1 product

Vendor	Product	Version	CPE status
wolfSSL	wolfSSL	Affected: 0 , < 5.9.0 (semver)	guessed

Credits

Jaehun Lee, Pohang University of Science and Technology (POSTECH) Kyungmin Bae, Pohang University of Science and Technology (POSTECH)

Show details on NVD website

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CNVD-2026-21718

Vulnerability from cnvd - Published: 2026-05-27

Title

wolfSSL存在未明漏洞（CNVD-2026-21718）

Description

wolfSSL（CyaSSL）是美国wolfSSL公司的一个针对嵌入式系统开发人员使用的小的、可移植的嵌入式SSL编程库。 wolfSSL存在安全漏洞，攻击者可利用该漏洞通过特制的HelloRetryRequest和省略key_share扩展的ServerHello消息，从(EC)DHE共享密钥推导出可预测的流量密钥，从而破坏TLS保护通信的机密性。

Severity

低

Patch Name

wolfSSL存在未明漏洞（CNVD-2026-21718）的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/wolfSSL/wolfssl/releases

Reference

https://github.com/wolfSSL/wolfssl/pull/9754

Impacted products

Name
wolfSSL WolfSSL <5.9.0

Show details on source website

JSON

To clipboard

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  "number": "CNVD-2026-21718",
  "openTime": "2026-05-27",
  "patchDescription": "wolfSSL\uff08CyaSSL\uff09\u662f\u7f8e\u56fdwolfSSL\u516c\u53f8\u7684\u4e00\u4e2a\u9488\u5bf9\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5f00\u53d1\u4eba\u5458\u4f7f\u7528\u7684\u5c0f\u7684\u3001\u53ef\u79fb\u690d\u7684\u5d4c\u5165\u5f0fSSL\u7f16\u7a0b\u5e93\u3002\r\n\r\nwolfSSL\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7\u7279\u5236\u7684HelloRetryRequest\u548c\u7701\u7565key_share\u6269\u5c55\u7684ServerHello\u6d88\u606f\uff0c\u4ece(EC)DHE\u5171\u4eab\u5bc6\u94a5\u63a8\u5bfc\u51fa\u53ef\u9884\u6d4b\u7684\u6d41\u91cf\u5bc6\u94a5\uff0c\u4ece\u800c\u7834\u574fTLS\u4fdd\u62a4\u901a\u4fe1\u7684\u673a\u5bc6\u6027\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "wolfSSL\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2026-21718\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "wolfSSL WolfSSL \u003c5.9.0"
  },
  "referenceLink": "https://github.com/wolfSSL/wolfssl/pull/9754",
  "serverity": "\u4f4e",
  "submitTime": "2026-03-26",
  "title": "wolfSSL\u5b58\u5728\u672a\u660e\u6f0f\u6d1e\uff08CNVD-2026-21718\uff09"
}

FKIE_CVE-2026-3230

Vulnerability from fkie_nvd - Published: 2026-03-19 21:17 - Updated: 2026-06-17 10:43

Severity

2.7 (Low) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	facts@wolfssl.com	https://github.com/wolfSSL/wolfssl/pull/9754	Issue Tracking, Patch

Impacted products

	Vendor	Product	Version
	wolfssl	wolfssl	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/wolfSSL/wolfssl",
          "defaultStatus": "unaffected",
          "modules": [
            "wolfSSL"
          ],
          "packageName": "wolfSSL",
          "product": "wolfSSL",
          "programFiles": [
            "tls.c",
            "tls13.c"
          ],
          "repo": "https://github.com/wolfSSL/wolfssl",
          "vendor": "wolfSSL",
          "versions": [
            {
              "lessThan": "5.9.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "facts@wolfssl.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DA3FA1CB-CEDC-4D49-9ECD-99BBF1602312",
              "versionEndExcluding": "5.9.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client\u0027s authentication of the server during TLS handshakes."
    },
    {
      "lang": "es",
      "value": "Falta un paso criptogr\u00e1fico requerido en la l\u00f3gica de handshake HelloRetryRequest del cliente TLS 1.3 en wolfSSL podr\u00eda llevar a un compromiso en la confidencialidad de las comunicaciones protegidas por TLS a trav\u00e9s de un HelloRetryRequest manipulado seguido de un mensaje ServerHello que omite la extensi\u00f3n key_share requerida, resultando en la derivaci\u00f3n de secretos de tr\u00e1fico predecibles a partir del secreto compartido (EC)DHE. Este problema no afecta la autenticaci\u00f3n del cliente del servidor durante los handshakes TLS."
    }
  ],
  "id": "CVE-2026-3230",
  "lastModified": "2026-06-17T10:43:15.530",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 2.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "YES",
          "Recovery": "AUTOMATIC",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.2,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "HIGH",
          "providerUrgency": "CLEAR",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "DIFFUSE",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:D/RE:X/U:Clear",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "facts@wolfssl.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-3230",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-20T17:08:54.344097Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-19T21:17:12.483",
  "references": [
    {
      "source": "facts@wolfssl.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/wolfSSL/wolfssl/pull/9754"
    }
  ],
  "sourceIdentifier": "facts@wolfssl.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "facts@wolfssl.com",
      "type": "Secondary"
    }
  ]
}

GHSA-G3XR-5F55-CF5G

Vulnerability from github – Published: 2026-03-19 21:30 – Updated: 2026-03-26 21:31

Details

Severity

2.7 (Low)


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

1.2 (Low)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:Y/R:A/V:D/U:Clear

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3230"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-19T21:17:12Z",
    "severity": "LOW"
  },
  "details": "Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client\u0027s authentication of the server during TLS handshakes.",
  "id": "GHSA-g3xr-5f55-cf5g",
  "modified": "2026-03-26T21:31:19Z",
  "published": "2026-03-19T21:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3230"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wolfSSL/wolfssl/pull/9754"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:A/V:D/RE:X/U:Clear",
      "type": "CVSS_V4"
    }
  ]
}

MSRC_CVE-2026-3230

Vulnerability from csaf_microsoft - Published: 2026-03-02 00:00 - Updated: 2026-04-22 01:39

Summary

Improper key_share validation in TLS 1.3 HelloRetryRequest

Scope

1 vulnerability in this advisory, including CVE-2026-3230.

CVE-2026-3230

Known affected: 1 product Known not affected: 2 products

Open the full advisory

UBUNTU-CVE-2026-3230 (CVE-2026-3230)

Vulnerability from osv_ubuntu – Published: 2026-03-19 21:17 – Updated: 2026-05-20 15:24 – Source website

Details

Severity

1.2 (Low)


                    
                      CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:Y/R:A/V:D/U:Clear

2.7 (Low)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-3230	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-3230	REPORT
	https://github.com/wolfSSL/wolfssl/pull/9754	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libcyassl5",
            "binary_version": "3.4.8+dfsg-1"
          },
          {
            "binary_name": "libwolfssl0",
            "binary_version": "3.4.8+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "wolfssl",
        "purl": "pkg:deb/ubuntu/wolfssl@3.4.8+dfsg-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.8+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwolfssl15",
            "binary_version": "3.13.0+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "wolfssl",
        "purl": "pkg:deb/ubuntu/wolfssl@3.13.0+dfsg-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.10.2+dfsg-2",
        "3.12.0+dfsg-1",
        "3.12.2+dfsg-1",
        "3.13.0+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwolfssl24",
            "binary_version": "4.3.0+dfsg-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "wolfssl",
        "purl": "pkg:deb/ubuntu/wolfssl@4.3.0+dfsg-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.1.0+dfsg-2",
        "4.2.0+dfsg-1",
        "4.2.0+dfsg-2",
        "4.2.0+dfsg-3",
        "4.3.0+dfsg-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwolfssl32",
            "binary_version": "5.2.0-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "wolfssl",
        "purl": "pkg:deb/ubuntu/wolfssl@5.2.0-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.6.0-3",
        "5.0.0-1",
        "5.1.1-1",
        "5.2.0-1",
        "5.2.0-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwolfssl42t64",
            "binary_version": "5.6.6-1.3build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "wolfssl",
        "purl": "pkg:deb/ubuntu/wolfssl@5.6.6-1.3build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.5.4-2",
        "5.5.4-2.1",
        "5.6.4-2",
        "5.6.6-1.2",
        "5.6.6-1.3",
        "5.6.6-1.3build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwolfssl42t64",
            "binary_version": "5.7.2-0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "wolfssl",
        "purl": "pkg:deb/ubuntu/wolfssl@5.7.2-0.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.7.2-0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libwolfssl44",
            "binary_version": "5.9.1-0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "wolfssl",
        "purl": "pkg:deb/ubuntu/wolfssl@5.9.1-0.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.7.2-0.1",
        "5.8.2-1.2",
        "5.8.4-1",
        "5.9.1-0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client\u0027s authentication of the server during TLS handshakes.",
  "id": "UBUNTU-CVE-2026-3230",
  "modified": "2026-05-20T15:24:29Z",
  "published": "2026-03-19T21:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3230"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-3230"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/wolfSSL/wolfssl/pull/9754"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:Y/R:A/V:D/U:Clear",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-3230"
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-3230 (GCVE-0-2026-3230)

CNVD-2026-21718

FKIE_CVE-2026-3230

GHSA-G3XR-5F55-CF5G

MSRC_CVE-2026-3230

UBUNTU-CVE-2026-3230 (CVE-2026-3230)

Tags

Sightings

Nomenclature

Related by attack behaviour