CVE-2026-54778

Severity CVSS v4.0:

Pending analysis

Type:

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Publication date:

08/07/2026

Last modified:

09/07/2026

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&#39;s identity to another or crash the host process under contention. This issue is fixed in versions 1.8.1 and 1.9.1.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.20 MEDIUM
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H

Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): High

Base Score 3.x

6.20

Severity 3.x

MEDIUM

CVE-2026-54778

Description

Impact

References to Advisories, Solutions, and Tools