SEPTEMBER 20, 2026
Live Feed
Back to database
Case File

CVE-2026-54779

MEDIUM · CVSS 5.9 EPSS 0.27% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-08 · Last synced 2026-08-07

CyberRota Analysis

AI-Generated

CoreWCF versions prior to 1.8.1 and 1.9.1 are vulnerable due to ineffective SAML token replay protection, allowing attackers to reuse captured tokens when the DetectReplayedTokens feature is enabled. This could lead to unauthorized access and potential data breaches. Organizations using affected versions should prioritize upgrading to the latest releases to mitigate this security risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗ github.com ↗ github.com ↗ github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-54779
Severity
MEDIUM
CVSS
5.9
EPSS
0.27%
Windows

Original NVD 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.