Security Advisory

CVE-2026-54774

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 22:17:07

Last updated 2026-07-10 03:55:39

Assigner GitHub_M

CVSS score 7.4

State PUBLISHED

Description

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 SecurityToken key identifier and bypass assertion signature verification. This issue is fixed in versions 1.8.1 and 1.9.1.

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