Is ruby-saml affected by CVE-2025-66568?

RubyGems ruby-saml is affected in <1.18.0.

Is CVE-2025-66568 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

critical

CVE-2025-66568

Q: Is CVE-2025-66568 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.2%.

RubyGems · ruby-saml

Summary

Ruby-saml allows a Libxml2 Canonicalization error to bypass Digest/Signature validation

Severity: critical
EPSS: 0.2% (p11)
Also known as: GHSA-x4h9-gwv3-r4m4
Published: 2025-12-08

References

Related advisories

CVE-2025-66567 — critical · RubyGems/ruby-saml
CVE-2025-25292 — critical · RubyGems/ruby-saml
CVE-2025-25291 — critical · RubyGems/ruby-saml
CVE-2024-45409 — critical · RubyGems/ruby-saml
CVE-2015-20108 — critical · RubyGems/ruby-saml
CVE-2025-25293 — high · RubyGems/ruby-saml
CVE-2017-11428 — high · RubyGems/ruby-saml
CVE-2025-54572 — medium · RubyGems/ruby-saml

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.