PT-2026-51073 · Nuget · Corewcf.Unixdomainsocket

Publicado 2026-06-19 · Atualizado 2026-06-19 · CVE-2026-54776

OSV

CVSS v3.1

4.4

Média

Vetor base

AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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.

Correção

Missing Authentication

Enumeração de Fraquezas

CWE-306

Identificadores relacionados

CVE-2026-54776

GHSA-WJPQ-6766-7F5J

Produtos afetados

Corewcf.Unixdomainsocket

Referências · 3

• https://github.com/CoreWCF/CoreWCF · Nota
• https://github.com/CoreWCF/CoreWCF/security/advisories/GHSA-wjpq-6766-7f5j · Nota
• https://osv.dev/vulnerability/GHSA-wjpq-6766-7f5j · Aviso do Fabricante