CVE-2026-31975

Name: CVE-2026-31975
Creator: NVD / NIST
Published: 2026-03-11T18:16:27.177+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10EPSS 3.43%

Last modified Jun 17, 2026

CVE-2026-31975 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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. EPSS estimates a 3.43% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

8.7/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

3.43%

87.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Cloudcli	Cloud Cli	< 1.25.0

References

https://github.com/siteboon/claudecodeui/commit/12e7f074d9563b3264caf9cec6e1b701c301af26Patch
https://github.com/siteboon/claudecodeui/releases/tag/v1.25.0Release Notes
https://github.com/siteboon/claudecodeui/security/advisories/GHSA-gv8f-wpm2-m5wrExploit, Vendor Advisory
https://github.com/siteboon/claudecodeui/security/advisories/GHSA-gv8f-wpm2-m5wrExploit, Vendor Advisory

Timeline

Published: Mar 11, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-31975?

How severe is CVE-2026-31975?

CVE-2026-31975 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 3.43% probability of exploitation in the next 30 days.

How do I fix CVE-2026-31975?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-31975?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST