CVE-2026-31861 Shell Command Injection in Git Routes [CloudCLI UI]
Authenticated attackers can execute arbitrary OS commands via the git configuration endpoint due to insufficient input sanitization in shell command construction.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-31861?
CVE-2026-31861 is a high-severity command injection vulnerability in siteboon claudecodeui, published on 11 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-94
Which versions are affected by CVE-2026-31861?
2 open source packages ship an affected version, including @siteboon/claude-code-ui. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@siteboon/claude-code-ui npm | All versions | 1.24.0 |
@siteboon/claude-code-ui npm | All versions | 1.24.0 |
Products include Cloudcli Cloud Cli.
How do I fix CVE-2026-31861?
Upgrade @siteboon/claude-code-ui to 1.24.0 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-31861 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31861 exists.
Other vulnerabilities in siteboon claudecodeui
Sources
Also known as GHSA-7fv4-fmmc-86g2.