{"id":"GHSA-jv46-xfwm-36j7","summary":"Relyra SAML SignatureValue not cryptographically verified -\u003e authentication bypass","details":"## Summary\n\nRelyra `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.\n\n## Details\n\nIn `1.0.0` and `1.1.0`, the XMLDSig trust boundary was incomplete. `: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.\n\n## Impact\n\nA forged `SignatureValue` carrying an attacker-controlled `NameID` can be accepted as `{:ok}`. Any relying-party application using Relyra `1.0.0` or `1.1.0` can be logged into as an arbitrary user if it trusts the affected response path.\n\n## Patches\n\nRelyra `1.2.0` closes the gap with real exclusive-C14N canonicalization, `:public_key.verify` against the configured IdP certificate's public key, and a constant-time `DigestValue` recompute/compare bound to the exact consumed node on both `verify/4` and `verify_metadata_root/4`.\n\n## Workarounds\n\nThere is no safe configuration of `1.0.0` or `1.1.0`. Upgrade to `1.2.0` or later.\n\n## Resources\n\n- Fix commit `2e45689` (wire real XMLDSig crypto into the candidate arm)\n- Fix commit `8910200` (close metadata trust bypass, pin over DER)\n- Regression proof: `test/security/xml/adversarial_crypto_test.exs`, `test/relyra/metadata/auto_refresh_test.exs`, `test/security/ci_gate_integrity_test.exs`","aliases":["CVE-2026-49454"],"modified":"2026-06-26T21:26:32.448937Z","published":"2026-06-26T21:05:13Z","database_specific":{"nvd_published_at":"2026-06-18T21:16:29Z","cwe_ids":["CWE-287","CWE-347"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2026-06-26T21:05:13Z"},"references":[{"type":"WEB","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":"WEB","url":"https://github.com/szTheory/relyra/commit/2e456897af3158c175bb490ce7fc51d6241c8922"},{"type":"WEB","url":"https://github.com/szTheory/relyra/commit/8910200"},{"type":"PACKAGE","url":"https://github.com/szTheory/relyra"}],"affected":[{"package":{"name":"relyra","ecosystem":"Hex","purl":"pkg:hex/relyra"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"1.2.0"}]}],"versions":["1.1.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-jv46-xfwm-36j7/GHSA-jv46-xfwm-36j7.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}