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{"bugzilla": {"description": "pyjwt: PyJWT: Token revocation bypass via non-canonical signature decoding", "id": "2542689", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2542689"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-1286", "details": ["A flaw was found in PyJWT. When decoding JSON Web Token (JWT) signature segments, the library accepts characters outside the standard Base64URL encoding format. A remote attacker can exploit this issue by appending extra characters to a valid token signature, creating an alternate token representation that decodes to the identical signature. Consequently, this can allow an attacker to bypass raw-token revocation checks or blocklists that rely on exact string matching."], "name": "CVE-2026-102269", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "jaeger", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "llvm21", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "rust", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "swift-lang", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-28T20:27:54Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-102269\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-102269\nhttps://github.com/jpadilla/pyjwt/commit/e6f48401001609a8f99e71fcaf355fb895d508a8\nhttps://github.com/jpadilla/pyjwt/releases/tag/2.14.0\nhttps://github.com/jpadilla/pyjwt/security/advisories/GHSA-hxm8-2xgr-2p9m"], "threat_severity": "Moderate"}