---
title: "CVE-2026-31862: @siteboon/claude-code-ui is Vulnerable to Command Injection via Multiple Parameters"
url: https://erroneo.us/security/cve/CVE-2026-31862/
description: "CVE-2026-31862 (@siteboon/claudecodeui (npm)): Cloud CLI (aka Claude Code UI) is a desktop and mobile UI for Claude Code, Cursor CLI, Codex, and Gemini-CLI.…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-11
date_modified: 2026-03-12
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-31862"
kev: false
cvss: 9.1
epss: 0.00592
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-31862: @siteboon/claude-code-ui is Vulnerable to Command Injection via Multiple Parameters

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.6% , percentile 48: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 48% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (high (admin)). Exposure depends on who can log in.
- Only applies if your dependency tree includes @siteboon/claudecodeui (npm) <= 1.23.0, fixed in 1.24.0 . Check your lockfile, including transitive dependencies.

## What it 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, multiple Git-related API endpoints use execAsync() with string interpolation of user-controlled parameters (file, branch, message, commit), allowing authenticated attackers to execute arbitrary OS commands. This vulnerability is fixed in 1.24.0.

## Affected packages

- npm `@siteboon/claudecodeui` <= 1.23.0 → fixed: 1.24.0

## Affected products (CVE record)

- siteboon claudecodeui: < 1.24.0

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.59% probability of exploitation activity in the next 30 days; percentile 48.

## Sources

- [GitHub Advisory GHSA-f2fc-vc88-6w7q](https://github.com/advisories/GHSA-f2fc-vc88-6w7q)
- [CVE.org record CVE-2026-31862](https://www.cve.org/CVERecord?id=CVE-2026-31862)
- [NVD entry CVE-2026-31862](https://nvd.nist.gov/vuln/detail/CVE-2026-31862)
- [github.com](https://github.com/siteboon/claudecodeui/security/advisories/GHSA-f2fc-vc88-6w7q)
- [github.com](https://github.com/siteboon/claudecodeui/releases/tag/v1.24.0)

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Source page: https://erroneo.us/security/cve/CVE-2026-31862/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt