VULNERABILITY INTELLIGENCE

CVE-2026-54779

CVSS score5.9 MEDIUM
EPSS probability0.43%
CISA KEVNot currently listed
Published2026-07-08
Last modified2026-07-09
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-294

Primary references