RCE in Cloudcli Cloud Cli
CVE-2026-31975
Cloud CLI (aka Claude Code UI) is a desktop and mobile UI for Claude Code, Cursor CLI, Codex, and Gemini-CLI. Prior to 1.25.0, OS Command Injection via WebSocket Shell. Both projectPath and initialCommand in server/index.js are taken directly from the WebSocket message payload and interpolated into a bash command string without any sanitization, enabling arbitrary OS command execution. A secondary injection vector exists via unsanitized sessionId. This vulnerability is fixed in 1.25.0.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.034 (87.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cloudcli Cloud_cli
- Siteboon Claudecodeui — versions < 1.25.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-31975?
- CVE-2026-31975 is a critical-severity vulnerability in Cloudcli Cloud Cli, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-03-11.
- How severe is CVE-2026-31975?
- Critical severity. CVSS v3 base score is 9.8 out of 10.