CVE-2026-54776

CoreWCF (UnixDomainSocket transport) with PosixIdentity client credentials is affected by a vulnerability where connections can bypass the framing-layer identity checks by skipping the application/unixposix stream upgrade before message dispatch. Affected versions include CoreWCF prior to 1.8.1 a...

CoreWCF: Unix Domain Socket PosixIdentity transport accepts connections that skip the security upgrade

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...

GHSA-WJPQ-6766-7F5J CoreWCF: Unix Domain Socket PosixIdentity transport accepts connections that skip the security upgrade

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...