Vulnerabilidad · Publicado 07/08/2026 · Actualizado 08/08/2026
OpenYak, un runtime local para modelos de IA con herramientas integradas, presenta una vulnerabilidad crítica (CVSS 9.6) en versiones anteriores a 1.1.3. El backend del escritorio expone una API HTTP sin validación de origen, autenticación de loopback ni enforcement de Content-Type, con política CORS abierta. Cualquier página web visitada mientras OpenYak se ejecuta puede ejecutar comandos arbitrarios en el sistema local, comprometiendo completamente la máquina del usuario.
OpenYak is a local-first agent runtime for reliable tool-using models, with a desktop workspace built on top. Prior to version 1.1.3, the OpenYak desktop backend binds an HTTP API to `127.0.0.1:<random port>` (commonly 19141) without server-side Origin validation, loopback authentication, or Content-Type enforcement, and with a wildcard CORS policy. Any webpage a user visits while OpenYak is running can issue cross-origin requests to this local server — the browser acts as a proxy into loopback, bypassing OS-level network isolation. Chained, this lets a malicious page execute arbitrary shell commands on the host (RCE) via the build agent with `permission_presets.bash=true`, shut down the service, and exfiltrate chat history and account PII — with no user interaction beyond opening the page. Version 1.1.3 patches the issue.
Score: 9.6/10 — Severidad: CRITICAL — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE-94, CWE-306, CWE-346, CWE-352, CWE-942
Publicado en NIST NVD.