CVE-2026-54778

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CVSS 3.1

6.2 medium

EPSS

<1%p3

Published

Jul 8, 2026 (Jul 8, 2026)

Modified

Jul 9, 2026

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 UnixDomainSocket POSIX peer identity resolution uses non-reentrant getpwuid and getgrgid calls, allowing concurrent connections to attribute one connection's identity to another or crash the host process under contention. This issue is fixed in versions 1.8.1 and 1.9.1.

Weakness: CWE-362, CWE-825
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

NVD CVE.org GitHub PoCs EPSS (0.1%)

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