# 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.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 11 Mar 2026
- **Updated:** 12 Mar 2026
- **Also known as:** GHSA-7fv4-fmmc-86g2

## 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 (Improper Control of Generation of Code)

## 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 | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@siteboon/claude-code-ui` | npm | All versions | 1.24.0 |
| `@siteboon/claude-code-ui` | npm | All versions | 1.24.0 |

Products: Cloudcli Cloud Cli.

## How do I fix CVE-2026-31861?

Upgrade @siteboon/claude-code-ui to 1.24.0 or later.

## 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

- [CVE-2026-31862](https://insights.sbomify.com/CVE-2026-31862/): Cloud CLI has Command Injection via Multiple Parameters (critical 9.1)
- [CVE-2026-31975](https://insights.sbomify.com/CVE-2026-31975/): Cloud CLI WebSocket shell injection (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-31861 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31861 exists.

Affected packages and fixed versions:
- @siteboon/claude-code-ui (npm): affected all versions; fixed in 1.24.0
- @siteboon/claude-code-ui (npm): affected all versions; fixed in 1.24.0

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-31861/ (Markdown: https://insights.sbomify.com/CVE-2026-31861/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-31861
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-31861
- OSV: https://osv.dev/vulnerability/CVE-2026-31861

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-31861/
Summaries are generated and may contain mistakes; the official description above is the record.