CVE-2026-54778
Medium
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.
SeverityMedium
CVSS6.2
Exploit probability—
ProductCorewcf.unixdomainsocket
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-362Race conditionCWE-825CWE-825
How to fix
Update
- CoreWCF.UnixDomainSocket1.8.1, 1.9.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| CoreWCF.UnixDomainSocketNuGet | v < 1.8.1, 1.9.0 ≤ v < 1.9.1 | 1.8.1, 1.9.1 |
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