Security Advisory

CVE-2026-54776

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 22:04:39

Last updated 2026-07-09 12:56:16

Assigner GitHub_M

CVSS score 4.4

State PUBLISHED

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, a CoreWCF service hosted on Unix Domain Sockets with PosixIdentity client credentials can accept connections that skip the application/unixposix stream upgrade before dispatching messages, bypassing framing-layer identity checks in UnixPosixIdentitySecurityUpgradeProvider. This issue is fixed in versions 1.8.1 and 1.9.1.

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