FishCodeTech Muteki up to 0.2.5 Default Local Worker Backend .claude/settings.json os command injection

Summaryinfo

A vulnerability categorized as critical has been discovered in FishCodeTech Muteki up to 0.2.5. The impacted element is an unknown function of the file .claude/settings.json of the component Default Local Worker Backend. The manipulation results in os command injection. This vulnerability is reported as CVE-2026-79623. The attack can be launched remotely. Moreover, an exploit is present. The issue was closed with the comment (translated from Chinese): "The project will be refactored and shut down."

Detailsinfo

A vulnerability was found in FishCodeTech Muteki up to 0.2.5. It has been classified as critical. Affected is an unknown functionality of the file .claude/settings.json of the component Default Local Worker Backend. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-79623. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details and a public exploit are known. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The issue was closed with the comment (translated from Chinese): "The project will be refactored and shut down." By approaching the search of inurl:.claude/settings.json it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• FishCodeTech

Name

• Muteki

Version

• 0.2.0
• 0.2.1
• 0.2.2
• 0.2.3
• 0.2.4
• 0.2.5

Website

• Product: https://github.com/FishCodeTech/muteki/

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Accepted

• Submit #887095: FishCodeTech Muteki v0.2.5 OS Command Injection (by micr0softDl)

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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