CVE-2026-46409

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Source

https://cve.org/CVERecord?id=CVE-2026-46409

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46409.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-46409

Aliases

GHSA-ccxp-q2w5-27jw

Published

2026-08-07T22:11:57.765Z

Modified

2026-08-09T03:30:12.447629480Z

Severity

9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVSS Calculator

Summary

OpenYak local API: unauthenticated CSRF chain leads to Remote Code Execution

Details

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.

Database specific

{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46409.json",
    "cwe_ids": [
        "CWE-306",
        "CWE-346",
        "CWE-352",
        "CWE-94",
        "CWE-942"
    ]
}

References

Affected packages

Git / github.com/openyak/openyak

Affected ranges

Type

GIT

Repo

https://github.com/openyak/openyak

Events

Introduced

Fixed

b57cb51e4ed77b2815c4a984036c58fd42b9ccf0

Database specific

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.1.3"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v1.*

v1.0.2

v1.0.3

v1.0.4

v1.0.5

v1.0.6

v1.0.7

v1.0.8

v1.1.0

v1.1.1

v1.1.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46409.json"