CVE-2026-79623 FishCodeTech Muteki Default Local Worker Backend settings.json os command injection
Remote attackers can execute arbitrary OS commands via the Default Local Worker Backend settings in FishCodeTech Muteki.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79623?
CVE-2026-79623 is a medium-severity command injection vulnerability in FishCodeTech Muteki, published on 25 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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."
Which versions are affected by CVE-2026-79623?
How do I fix CVE-2026-79623?
No fix has been published for CVE-2026-79623 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-79623 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79623 exists.
Sources
Also known as GHSA-w4x2-2pcx-2cpc.