siteboon claudecodeui up to 1.23.x Git Configuration Endpoint /api/user/git-config exec gitEmail code injection

Summaryinfo

A vulnerability marked as critical has been reported in siteboon claudecodeui up to 1.23.x. Affected by this vulnerability is the function exec of the file /api/user/git-config of the component Git Configuration Endpoint. This manipulation of the argument gitEmail causes code injection. This vulnerability is registered as CVE-2026-31861. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in siteboon claudecodeui up to 1.23.x. Affected by this vulnerability is the function exec of the file /api/user/git-config of the component Git Configuration Endpoint. The manipulation of the argument gitEmail with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Cloud CLI (aka Claude Code UI) is a desktop and mobile UI for Claude Code, Cursor CLI, Codex, and Gemini-CLI. Prior to 1.24.0, The /api/user/git-config endpoint constructs shell commands by interpolating user-supplied gitName and gitEmail values into command strings passed to child_process.exec(). The input is placed within double quotes and only " is escaped, but backticks (`), $() command substitution, and \ sequences are all interpreted within double-quoted strings in bash. This allows authenticated attackers to execute arbitrary OS commands via the git configuration endpoint. This vulnerability is fixed in 1.24.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-31861 since 03/09/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 1.24.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 86c33c1c0cb34176725a38f46960213714fc3e04 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• siteboon

Name

• claudecodeui

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23

License

• open-source

Website

• Product: https://github.com/siteboon/claudecodeui/

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