szory relyra up to 1.1.x on Elixir/Phoenix improper authentication

Summaryinfo

A vulnerability described as critical has been identified in szory relyra up to 1.1.x on Elixir/Phoenix. This affects an unknown part. Executing a manipulation can lead to improper authentication. This vulnerability is handled as CVE-2026-49454. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in szory relyra up to 1.1.x on Elixir/Phoenix. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-49454 since 05/30/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 1.2.0 eliminates this vulnerability. Applying the patch 2e456897af3158c175bb490ce7fc51d6241c8922 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• szory

Name

• relyra

Version

• 1.0
• 1.1

License

• open-source

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CPE 2.2info

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