{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-102946",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-29T20:24:43.341Z",
        "datePublished": "2026-10-15T18:28:06.913Z",
        "dateUpdated": "2026-10-15T19:53:09.069Z"
    },
    "containers": {
        "cna": {
            "title": "joserfc: JWS signature verification bypass via empty signatures array in jws.deserialize_json",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-290",
                            "lang": "en",
                            "description": "CWE-290: Authentication Bypass by Spoofing",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-345",
                            "lang": "en",
                            "description": "CWE-345: Insufficient Verification of Data Authenticity",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-347",
                            "lang": "en",
                            "description": "CWE-347: Improper Verification of Cryptographic Signature",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "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"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/authlib/joserfc/security/advisories/GHSA-4pp3-559j-c5c2",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/authlib/joserfc/security/advisories/GHSA-4pp3-559j-c5c2"
                },
                {
                    "name": "https://github.com/authlib/joserfc/commit/f409f8f058225d7686acab6546c94593e4c1bfbe",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/authlib/joserfc/commit/f409f8f058225d7686acab6546c94593e4c1bfbe"
                },
                {
                    "name": "https://github.com/authlib/joserfc/releases/tag/1.7.4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/authlib/joserfc/releases/tag/1.7.4"
                }
            ],
            "affected": [
                {
                    "vendor": "authlib",
                    "product": "joserfc",
                    "versions": [
                        {
                            "version": "< 1.7.4",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-15T18:28:06.913Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.7.4, joserfc.jws.deserialize_json() accepts a JWS General JSON Serialization with an empty signatures array as authenticated. The verify_general_json() loop performs no iterations for the empty array and returns success because no signature check failed, allowing an attacker without a signing key to supply an arbitrary payload that relying applications may treat as authentic. The issue affects the General JSON Serialization path; compact JWS and JWT decoding, Flattened JSON serialization, and JWE JSON processing do not follow this vulnerable path. This issue is fixed in version 1.7.4."
                }
            ],
            "source": {
                "advisory": "GHSA-4pp3-559j-c5c2",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/authlib/joserfc/security/advisories/GHSA-4pp3-559j-c5c2",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-15T19:52:38.661517Z",
                                "id": "CVE-2026-102946",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-15T19:53:09.069Z"
                }
            }
        ]
    }
}