Medium severity6.2NVD Advisory· Published Jul 8, 2026· Updated Jul 9, 2026
CVE-2026-54778
CVE-2026-54778
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
CoreWCF.UnixDomainSocketNuGet | < 1.8.1 | 1.8.1 |
CoreWCF.UnixDomainSocketNuGet | >= 1.9.0, < 1.9.1 | 1.9.1 |
Affected products
1Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-q6v9-43v5-jv9qghsaADVISORY
- github.com/CoreWCF/CoreWCF/security/advisories/GHSA-q6v9-43v5-jv9qnvdWEB
- github.com/CoreWCF/CoreWCF/commit/a3d95ea4627b818995e92c7def4c016164cacfcenvd
- github.com/CoreWCF/CoreWCF/commit/b0acb105589b455a095ea5ff49f5191e4eeff791nvd
- github.com/CoreWCF/CoreWCF/commit/b4867547c94bb088568935d581a55dda18a621e1nvd
- github.com/CoreWCF/CoreWCF/releases/tag/v1.8.1nvd
- github.com/CoreWCF/CoreWCF/releases/tag/v1.9.1nvd
News mentions
1- CoreWCF: 13 CVEs Disclosed in a Single Day — Critical SAML Bypass and WS-Security FlawsVypr Intelligence · Jun 19, 2026