{"schema":"threatline.record/2","record":{"id":"CVE-2026-114615","aliases":["GHSA-7vr2-2fgp-9w7p"],"summary":"Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys","details":"Authlib is a Python library which builds OAuth and OpenID Connect servers. From 1.3.1 until 1.9.0, OctKey.import_key() checks asymmetric-key markers only at byte zero while Authlib's PEM loaders accept leading whitespace, comments, or a byte-order mark. In deployments that use the documented mixed algorithm registry and already configure verification with PEM or certificate bytes containing such a prefix, an unauthenticated attacker who knows those same public-key bytes can use them as an HMAC secret and forge HS256 tokens with arbitrary identity or authorization claims. This is a bypass of the remediation for CVE-2024-37568. The module-level jwt object reaches OctKey.import_key() in authlib/jose/rfc7518/oct_key.py, where POSSIBLE_UNSAFE_KEYS fails to identify prefixed asymmetric key material. This issue is fixed in version 1.9.0.","categories":["Unclassified"],"product":"authlib","vendor":"authlib","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-114615","source_modified_at":"2026-10-22T21:10:02.023Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"authlib","vendor":"authlib","versions":[{"version":">= 1.3.1, < 1.9.0","status":"affected"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/authlib/authlib/security/advisories/GHSA-7vr2-2fgp-9w7p","source_modified_at":"2026-10-22T21:08:54Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"pip","name":"authlib"},"range":">=1.3.1,<= 1.8.0"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/authlib/authlib/security/advisories/GHSA-7vr2-2fgp-9w7p","source_modified_at":"2026-10-22T21:08:54Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"pip","name":"authlib"},"version":"1.9.0"}],"cvss":7.4,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00127,"percentile":0.02184,"score_date":"2026-10-23"},"published_at":"2026-10-22T21:10:02.023Z","modified_at":"2026-10-22T21:10:02.023Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-114615","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T21:10:02.023Z"},{"source":"GitHub Advisory Database","url":"https://github.com/authlib/authlib/security/advisories/GHSA-7vr2-2fgp-9w7p","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T21:08:54Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114615","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/authlib/authlib/security/advisories/GHSA-7vr2-2fgp-9w7p","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/authlib/authlib/pull/945","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/authlib/authlib/commit/e3bd41cb29dcfee434453b135ffb487884baeedf","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/authlib/authlib/releases/tag/v1.9.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-22T21:10:02.023Z","content_hash":"4d908941b1231aaa8ba71cd4155cd12504c4d7d2e87c0dc57dffdedb9037cd8d"}}