RCE in Fishcodetech Muteki
CVE-2026-79623
A security vulnerability has been detected in FishCodeTech Muteki up to 0.2.5. The affected element is an unknown function of the file .claude/settings.json of the component Default Local Worker Backend. The manipulation leads to os command injection. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The issue was closed with the comment (translated from Chinese): "The project will be refactored and shut down."
Vulnerability class: Command Injection (OS Command Injection)
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Fishcodetech Muteki — versions 0.2.0, 0.2.1, 0.2.2
Weakness classification (CWE)
References
- cna@vuldb.com (vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (issue-tracking)
- cna@vuldb.com (exploit)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-79623?
- CVE-2026-79623 is a medium-severity vulnerability in Fishcodetech Muteki, classified under Command Injection. CVSS score: 6.3/10. Published 2026-08-25.
- How severe is CVE-2026-79623?
- Medium severity. CVSS v3 base score is 6.3 out of 10.