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CVE-2026-79623— FishCodeTech Muteki Default Local Worker Backend settings.json os command injection

Quick assessment

Affected
FishCodeTech Muteki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 FishCodeTech Muteki 0.2.5 及更早版本中发现了一个安全漏洞。受影响的是默认本地工作器后端（Default Local Worker Backend）组件中 文件的一个未知函数。该漏洞可导致操作系统命令注入。攻击者可以从远程发起攻击。该漏洞的利用方法已公开披露，可能被他人利用。该问题以如下评论（从中文翻译）关闭：“该项目将进行重构并停止维护。”

CVSS 6.3 · Medium EPSS 1.42% · P71

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 6

VendorProduct Version RangeStatus
FishCodeTech Muteki 0.2.0 affected
0.2.1 affected
0.2.2 affected
0.2.3 affected
0.2.4 affected
0.2.5 affected
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I. Basic Information for CVE-2026-79623

Vulnerability Information
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Vulnerability Title
FishCodeTech Muteki Default Local Worker Backend settings.json os command injection
Source: CVE Program / CVE List V5
Vulnerability 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."
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FishCodeTech Muteki 0.2.0 cpe:2.3:a:fishcodetech:muteki:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-79623

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III. Intelligence Information for CVE-2026-79623

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Vendor Advisories for CVE-2026-79623 (3)

Proof of Concept for CVE-2026-79623 (1)

Other References for CVE-2026-79623 (1)

IV. Related Vulnerabilities

Same weakness: CWE-78

V. Comments for CVE-2026-79623

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