Security Risk Category

holder-of-key Security Risks

Published vulnerability pages connected to holder-of-key. One risk can appear in multiple categories while keeping one canonical page.

holder-of-key risks

Showing 1 of 1 published risks.

highEPSS 0.002

CoreWCF SAML SubjectConfirmation Holder-of-Key Bypass Vulnerability

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, CoreWCF SAML token validation does not enforce SubjectConfirmation method URIs or holder-of-key proof keys in SamlSecurityTokenHandler, allowing holder-of-key downgrade or custom confirmation method assertions to authenticate a subject without proving authority over the assertion. This issue is fixed in versions 1.8.1 and 1.9.1.

CVE-2026-54781corewcfdotnetnugetwcf

Updated Jul 10, 2026