Security Advisory

CVE-2026-54782

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 22:20:37

Last updated 2026-07-10 03:55:37

Assigner GitHub_M

CVSS score 10.0

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, CoreWCF SAML 1.1 and SAML 2.0 token validation does not correctly resolve the issuer signing key or require signed tokens when IdentityConfiguration is used with federated bindings, allowing an unauthenticated remote attacker to impersonate any principal the trusted STS could issue. This issue is fixed in versions 1.8.1 and 1.9.1.

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