Security Risk Category

spnego Security Risks

Published vulnerability pages connected to spnego. One risk can appear in multiple categories while keeping one canonical page.

spnego risks

Showing 1 of 1 published risks.

highEPSS 0.002

CoreWCF SPNEGO SecurityContextToken Proof Key Exposure Vulnerability

CoreWCF 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.

CVE-2026-54784corewcfdotnetnugetspnego

Updated Jul 10, 2026