{"api_version":"1","generated_at":"2026-06-21T04:25:00+00:00","cve":"CVE-2026-49454","urls":{"html":"https://cve.report/CVE-2026-49454","api":"https://cve.report/api/cve/CVE-2026-49454.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-49454","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-49454"},"summary":{"title":"Relyra SAML SignatureValue not cryptographically verified -> authentication bypass","description":"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}. 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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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-18T20:52:22.605Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/szTheory/relyra/security/advisories/GHSA-jv46-xfwm-36j7","tags":["x_refsource_CONFIRM"],"url":"https://github.com/szTheory/relyra/security/advisories/GHSA-jv46-xfwm-36j7"},{"name":"https://github.com/szTheory/relyra/commit/2e456897af3158c175bb490ce7fc51d6241c8922","tags":["x_refsource_MISC"],"url":"https://github.com/szTheory/relyra/commit/2e456897af3158c175bb490ce7fc51d6241c8922"},{"name":"https://github.com/szTheory/relyra/commit/8910200","tags":["x_refsource_MISC"],"url":"https://github.com/szTheory/relyra/commit/8910200"}],"source":{"advisory":"GHSA-jv46-xfwm-36j7","discovery":"UNKNOWN"},"title":"Relyra SAML SignatureValue not cryptographically verified -> authentication bypass"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-49454","datePublished":"2026-06-18T20:52:22.605Z","dateReserved":"2026-05-30T02:43:33.107Z","dateUpdated":"2026-06-18T20:52:22.605Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-18 21:16:29","lastModifiedDate":"2026-06-18 21:16:29","problem_types":["CWE-287","CWE-347","CWE-287 CWE-287: Improper Authentication","CWE-347 CWE-347: Improper Verification of Cryptographic Signature"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"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","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"49454","Ordinal":"1","Title":"Relyra SAML SignatureValue not cryptographically verified -> aut","CVE":"CVE-2026-49454","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"49454","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Relyra SAML SignatureValue not cryptographically verified -> aut"}]}}}