CVE-2026-49454 - Relyra SAML SignatureValue not cryptographically verified -> authentication bypass

CVE-2026-49454 - Relyra SAML SignatureValue not cryptographically verified -> authentication bypass

https://cvefeed.io/rssfeed/latest.atom / Thu, 06/18/2026 - 23:45
CVE ID :CVE-2026-49454
Published : June 18, 2026, 8:52 p.m. | 46 minutes ago
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}. This issue has been fixed in version 1.2.0.
Severity: 0.0 | NA
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