What’s Vulnerable › Vulnerabilities

CVE-2026-31975: Cloud CLI WebSocket shell injection

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-11 · updated 2026-06-17
• Weakness: CWE-78

Description

Cloud CLI (aka Claude Code UI) is a desktop and mobile UI for Claude Code, Cursor CLI, Codex, and Gemini-CLI. Prior to 1.25.0, 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.

Affected products

• Cloudcli Cloud Cli: before 1.25.0 — fixed in 1.25.0

How to fix

Upgrade to a fixed version: Cloudcli Cloud Cli 1.25.0. Check the vendor advisory for mitigations.

References

• https://github.com/siteboon/claudecodeui/commit/12e7f074d9563b3264caf9cec6e1b701c301af26
• https://github.com/siteboon/claudecodeui/releases/tag/v1.25.0
• https://github.com/siteboon/claudecodeui/security/advisories/GHSA-gv8f-wpm2-m5wr
• https://github.com/siteboon/claudecodeui/security/advisories/GHSA-gv8f-wpm2-m5wr

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