CVE-2026-54774

CoreWCF (CoreWCF.Primitives and related components) is affected by CVE-2026-54774 where SamlSerializer may skip final SignatureValue verification when validating SAML tokens signed with a non-X.509 issuer token. The vulnerability arises when an out-of-band token resolver provides a non-X.509 Secu...

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

CoreWCF is a port of the service side of Windows Communication Foundation WCF to .NET Core. Prior to 1.8.1 and 1.9.1, SamlSerializer skips final SignatureValue verification when a CoreWCF service validates SAML tokens using a non-X.509 signing token, allowing an attacker to reference a non-X.509...

PT-2026-51071

Name of the Vulnerable Software and Affected Versions CoreWCF versions prior to 1.8.1 CoreWCF versions prior to 1.9.1 Description The SamlSerializer skips the final SignatureValue verification when a service validates SAML tokens using a non-X.509 signing token. This occurs when the service is...