Security Advisory

CVE-2026-54779

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 22:07:46

Last updated 2026-07-09 14:17:57

Assigner GitHub_M

CVSS score 5.9

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 token replay protection is inoperative because DefaultTokenReplayCache.TryAdd does not reject duplicate tokens when DetectReplayedTokens is enabled, allowing a captured token to be reused. This issue is fixed in versions 1.8.1 and 1.9.1.

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