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CVE-2026-54774 CoreWCF: SamlSerializer skips SignatureValue verification when SAML signing token is not an X.509 certificate

🗓️ 08 Jul 2026 22:17:07Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 2 Views

CoreWCF SamlSerializer fails to verify SignatureValue for non certificate tokens, enabling bypass of assertion signatures. Fixed in 1.8.1 and 1.9.1.

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11 Jul 2026 03:54Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.17.4
EPSS0.0015
2