CVE Watch7 ago 2026

CVE-2026-46409

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 Op

CVSS

9.6

Crítico

EPSS

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KEV

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Exploit Today

0-100

Publicado: 7 ago 2026 · Última mod.: 7 ago 2026 · CWE-94 · CWE-306 · CWE-346

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

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.

Referencias oficiales

github.comhttps://github.com/openyak/openyak/security/advisories/GHSA-ccxp-q2w5-27jw

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