{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-102272",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-09-28T20:11:16.658Z",
        "datePublished": "2026-09-28T20:36:31.530Z",
        "dateUpdated": "2026-09-28T20:36:31.530Z"
    },
    "containers": {
        "cna": {
            "title": "PyJWT BOM Bypass",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-347",
                            "lang": "en",
                            "description": "CWE-347: Improper Verification of Cryptographic Signature",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 7.4,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/jpadilla/pyjwt/security/advisories/GHSA-r6x4-923q-g947",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/jpadilla/pyjwt/security/advisories/GHSA-r6x4-923q-g947"
                },
                {
                    "name": "https://github.com/jpadilla/pyjwt/commit/180783930de91876bc0d601f826a1f2956057291",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jpadilla/pyjwt/commit/180783930de91876bc0d601f826a1f2956057291"
                },
                {
                    "name": "https://github.com/jpadilla/pyjwt/releases/tag/2.14.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/jpadilla/pyjwt/releases/tag/2.14.0"
                }
            ],
            "affected": [
                {
                    "vendor": "jpadilla",
                    "product": "pyjwt",
                    "versions": [
                        {
                            "version": ">= 2.13.0, < 2.14.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-09-28T20:36:31.530Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, HMACAlgorithm.prepare_key in jwt/algorithms.py is affected because raw-JWK detector does not normalize accepted Unicode byte-order marks before checking for JSON. This occurs when a public JWK is prefixed with a UTF-8 BOM and used in a mixed-algorithm verification path. As a result, public JWK bypasses asymmetric-key detection and becomes the HMAC secret. Consequently, an attacker who knows the public key can forge authenticated tokens. This issue is fixed in version 2.14.0."
                }
            ],
            "source": {
                "advisory": "GHSA-r6x4-923q-g947",
                "discovery": "UNKNOWN"
            }
        }
    }
}