{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-15346",
        "assignerOrgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
        "state": "PUBLISHED",
        "assignerShortName": "wolfSSL",
        "dateReserved": "2025-12-29T23:24:20.378Z",
        "datePublished": "2026-01-07T23:32:11.146Z",
        "dateUpdated": "2026-01-08T19:22:49.043Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://pypi.org/",
                    "defaultStatus": "unaffected",
                    "modules": [
                        "TLS Peer Certificate Verification (CERT_REQUIRED verify mode)"
                    ],
                    "packageName": "wolfssl",
                    "platforms": [
                        "Linux",
                        "MacOS",
                        "Windows"
                    ],
                    "product": "wolfSSL-py",
                    "programFiles": [
                        "wolfssl/__init__.py"
                    ],
                    "repo": "https://github.com/wolfSSL/wolfssl-py",
                    "vendor": "wolfSSL",
                    "versions": [
                        {
                            "lessThanOrEqual": "5.8.2",
                            "status": "affected",
                            "version": "5.3.0",
                            "versionType": "python"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Matan Radomski"
                }
            ],
            "datePublic": "2025-12-29T23:21:00.000Z",
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<div>\nA vulnerability in the handling of <code>verify_mode = CERT_REQUIRED</code> in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced.&nbsp;</div><div>Because the <code>WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT</code> flag was not included, the behavior effectively matched <code>CERT_OPTIONAL</code>: a peer certificate was verified if presented, but connections were incorrectly authenticated when no client certificate was provided.&nbsp;</div><div>This results in improper authentication, allowing attackers to bypass mutual TLS (mTLS) client authentication by omitting a client certificate during the TLS handshake.&nbsp;</div><div>The issue affects versions up to and including 5.8.2.</div>"
                        }
                    ],
                    "value": "A vulnerability in the handling of verify_mode = CERT_REQUIRED in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced. \n\nBecause the WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT flag was not included, the behavior effectively matched CERT_OPTIONAL: a peer certificate was verified if presented, but connections were incorrectly authenticated when no client certificate was provided. \n\nThis results in improper authentication, allowing attackers to bypass mutual TLS (mTLS) client authentication by omitting a client certificate during the TLS handshake. \n\nThe issue affects versions up to and including 5.8.2."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-115",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-115 Authentication Bypass"
                        }
                    ]
                },
                {
                    "capecId": "CAPEC-220",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-220 Client-Server Protocol Manipulation"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "YES",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "attackVector": "NETWORK",
                        "baseScore": 9.3,
                        "baseSeverity": "CRITICAL",
                        "exploitMaturity": "NOT_DEFINED",
                        "privilegesRequired": "NONE",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/AU:Y",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-306",
                            "description": "CWE-306 Missing Authentication for Critical Function",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-287",
                            "description": "CWE-287 Improper Authentication",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "50d2cd11-d01a-48ed-9441-5bfce9d63b27",
                "shortName": "wolfSSL",
                "dateUpdated": "2026-01-07T23:32:11.146Z"
            },
            "references": [
                {
                    "url": "https://github.com/wolfSSL/wolfssl-py/pull/62"
                },
                {
                    "url": "https://github.com/wolfSSL/wolfssl-py/commit/b4517dece79f682a8f453abce5cfc0b81bae769d"
                },
                {
                    "url": "https://github.com/wolfSSL/wolfssl-py/releases/tag/v5.8.4-stable"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "tags": [
                "x_open-source"
            ],
            "title": "wolfSSL Python library `CERT_REQUIRED` mode fails to enforce client certificate requirement",
            "x_generator": {
                "engine": "Vulnogram 0.5.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-01-08T19:22:43.022302Z",
                                "id": "CVE-2025-15346",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
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                "title": "CISA ADP Vulnrichment",
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                    "dateUpdated": "2026-01-08T19:22:49.043Z"
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