{"id":"CVE-2026-49454","summary":"Relyra SAML SignatureValue not cryptographically verified -\u003e authentication bypass","details":"Relyra is a strict-by-default SAML 2.0 Service Provider library for Elixir and Phoenix. Versions 1.0.0 and 1.1.0 accept forged SAML signatures because SignatureValue was not cryptographically verified before the library returned a successful authentication result. The XMLDSig trust boundary was incomplete as :public_key.verify over the exclusive-C14N canonicalized SignedInfo was not performed against the configured IdP certificate's public key, DigestValue was not recomputed over the canonicalized referenced element, and canonicalize/2 remained an unused passthrough in the signature-verification path. The result was a structure-only acceptance path where document shape and trust-source rejection could succeed without proving the signature bytes. A forged SignatureValue carrying an attacker-controlled NameID could be accepted as {:ok}. This issue has been fixed in version 1.2.0.","aliases":["GHSA-jv46-xfwm-36j7"],"modified":"2026-07-08T08:13:40.466039131Z","published":"2026-06-18T20:52:22.605Z","database_specific":{"cwe_ids":["CWE-287","CWE-347"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49454.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49454.json"},{"type":"ADVISORY","url":"https://github.com/szTheory/relyra/security/advisories/GHSA-jv46-xfwm-36j7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49454"},{"type":"FIX","url":"https://github.com/szTheory/relyra/commit/2e456897af3158c175bb490ce7fc51d6241c8922"},{"type":"FIX","url":"https://github.com/szTheory/relyra/commit/8910200"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sztheory/relyra","events":[{"introduced":"0"},{"fixed":"2e456897af3158c175bb490ce7fc51d6241c8922"},{"fixed":"8910200"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"1.0.0"},{"fixed":"1.2.0"}]}}],"versions":["v1.1.0","v1.0","v0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49454.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}