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CVE-2026-46409— OpenYak local API: unauthenticated CSRF chain leads to Remote Code Execution

Quick assessment

Affected
openyak openyak
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenYak是openYak组织的一个安全检测平台。 OpenYak 1.1.3之前版本存在安全漏洞，该漏洞源于桌面后端HTTP API缺少服务器端Origin验证、回环认证和Content-Type强制，并配置了通配符CORS策略，可能导致恶意网页通过浏览器代理向本地服务发起跨域请求，从而执行任意shell命令、关闭服务以及泄露聊天记录和账户个人信息。

CVSS 9.6 · Critical EPSS 0.28% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
openyak openyak < 1.1.3 affected
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I. Basic Information for CVE-2026-46409

Vulnerability Information
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Vulnerability Title
OpenYak local API: unauthenticated CSRF chain leads to Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
OpenYak 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenYak是openYak组织的一个安全检测平台。 OpenYak 1.1.3之前版本存在安全漏洞，该漏洞源于桌面后端HTTP API缺少服务器端Origin验证、回环认证和Content-Type强制，并配置了通配符CORS策略，可能导致恶意网页通过浏览器代理向本地服务发起跨域请求，从而执行任意shell命令、关闭服务以及泄露聊天记录和账户个人信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openyak openyak < 1.1.3 -

II. Public POCs for CVE-2026-46409

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7968 chars
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III. Intelligence Information for CVE-2026-46409

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Vendor Advisories for CVE-2026-46409 (1)

IV. Related Vulnerabilities

Same weakness: CWE-94