Security Advisory

CVE-2026-54784

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 22:18:13

Last updated 2026-07-10 03:55:38

Assigner GitHub_M

CVSS score 7.4

State PUBLISHED

Description

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.

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