CVE-2026-79623: Command Injection (CVSS 6.3)

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."

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CVSS v3.1 Score

6.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0142

Probability of exploitation

0.72%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-77 CWE-77

CWE-78 OS Command Injection

References

Other References

https://github.com/FishCodeTech/muteki/ https://github.com/FishCodeTech/muteki/issues/7 https://github.com/micr0softDrestlife/muteki_vul_report https://vuldb.com/cve/CVE-2026-79623 https://vuldb.com/submit/887095 https://vuldb.com/vuln/394962 https://vuldb.com/vuln/394962/cti

Frequently Asked Questions

What is 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." It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2026-79623? +

CVE-2026-79623 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0142, placing it in the 1th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-79623? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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