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CVE-2025-66567

Published: Dec 9, 2025

Modified: Dec 9, 2025

PUBLISHED

Description

The ruby-saml library is for implementing the client side of a SAML authorization. ruby-saml versions up to and including 1.12.4 contain an authentication bypass vulnerability due to an incomplete fix for CVE-2025-25292. ReXML and Nokogiri parse XML differently, generating entirely different document structures from the same input. This allows an attacker to execute a Signature Wrapping attack. This issue is fixed in version 1.18.0.

Vendor	Product	Versions
SAML-Toolkits	ruby-saml	affected `< 1.18.0`

Weaknesses (CWE)

References

https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-9v8j-x534-2fx3

x_refsource_CONFIRM

https://github.com/SAML-Toolkits/ruby-saml/commit/e9c1cdbd0f9afa467b585de279db0cbd0fb8ae97

x_refsource_MISC

https://github.com/advisories/GHSA-754f-8gm6-c4r2

x_refsource_MISC

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