https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-02T11:00:55.051270+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/euvd-2026-335226 EUVD-2026-335226 2026-10-02T11:00:55.053559+00:00 EUVD-2026-335226 https://cve.radiocsirt.org/vuln/fkie_cve-2026-54776 fkie_cve-2026-54776 2026-10-02T11:00:55.053589+00:00

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.

 https://cve.radiocsirt.org/vuln/ghsa-wjpq-6766-7f5j GHSA-wjpq-6766-7f5j — CoreWCF: Unix Domain Socket PosixIdentity transport accepts connections that skip the security upgrade 2026-10-02T11:00:55.053619+00:00

Affected: NuGet: CoreWCF.UnixDomainSocket

### Impact A CoreWCF service hosted on Unix Domain Sockets with the PosixIdentity client credential type (UnixDomainSocketBinding with Security.Mode = TransportCredentialOnly and Security.Transport.ClientCredentialType = PosixIdentity) does not require the client to perform the application/unixposix stream upgrade before dispatching messages.

### Patches Fixed in CoreWCF v1.8.1 and v1.9.1

### Workarounds Restrict filesystem access to the UDS socket file using owner/group/mode (e.g. chmod 0660 plus a dedicated group) so that only the POSIX users who are already authorized to invoke the service can connect at all. This makes the missing-upgrade behaviour equivalent to the operating system’s filesystem permissions instead of relying on framing-layer identity checks. Avoid relying on ServiceSecurityContext.PrimaryIdentity for authorization decisions, or back it up with an authentication-required authorization policy that rejects anonymous principals.