{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-49454: Relyra SAML SignatureValue not cryptographically verified -> authentication bypass","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-49454","status":"final","version":"1","initial_release_date":"2026-06-18T20:52:22.605Z","current_release_date":"2026-06-18T20:52:22.605Z","revision_history":[{"date":"2026-06-18T20:52:22.605Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-49454 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-49454"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-49454"},{"category":"external","summary":"https://github.com/szTheory/relyra/security/advisories/GHSA-jv46-xfwm-36j7","url":"https://github.com/szTheory/relyra/security/advisories/GHSA-jv46-xfwm-36j7"},{"category":"external","summary":"https://github.com/szTheory/relyra/commit/2e456897af3158c175bb490ce7fc51d6241c8922","url":"https://github.com/szTheory/relyra/commit/2e456897af3158c175bb490ce7fc51d6241c8922"},{"category":"external","summary":"https://github.com/szTheory/relyra/commit/8910200","url":"https://github.com/szTheory/relyra/commit/8910200"}]},"product_tree":{"branches":[{"category":"vendor","name":"szTheory","branches":[{"category":"product_name","name":"relyra","branches":[{"category":"product_version","name":">= 1.0.0, < 1.2.0","product":{"name":"szTheory relyra >= 1.0.0, < 1.2.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:sztheory:relyra:\\>\\=_1.0.0\\,_\\<_1.2.0:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-49454","title":"Relyra SAML SignatureValue not cryptographically verified -> authentication bypass","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}