OpenYak local API: unauthenticated CSRF chain leads to Remote Code Execution
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| openyak | openyak | affected |
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No data.
No data.
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| Openyak | Openyak |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.282% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Openyak
Openyak openyak |
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| Vendors & Products |
Openyak
Openyak openyak |
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| 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. | |
| Title | OpenYak local API: unauthenticated CSRF chain leads to Remote Code Execution | |
| Weaknesses | CWE-306 CWE-346 CWE-352 CWE-94 CWE-942 |
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| References |
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| Metrics |
cvssV3_1
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