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CVE-2025-15662 · CVSS 8.6 CVE-2025-50455 · CVSS 9.1 CVE-2025-59172 · CVSS 8.5 CVE-2025-68686 · Fortinet FortiOS

weakness type

CWE-523

1: vulnerability tracked
8 July 2026: latest publication

cve

Vulnerability watch

idvulnerabilityseveritypublished

CVE-2026-54784CoreWCF is a port of the service side of Windows Communication Foundation (WCF) to .NET Core. In version 1.9.0, CoreWCF SPNEGO SecurityContextToken negotiation can expose the proof key recovered from the RSTR when TransportWithMessageCredential with Windows client credentials and session establishment are used, allowing an observer to impersonate the authenticated Windows principal and decrypt or forge WS-SecureConversation traffic. This issue is fixed in version 1.9.1. High CVSS 7.4 08/07