CVE-2026-31862

CriticalRCE

Published: 11 March 2026

Published

11 March 2026

Modified

17 March 2026

KEV Added

—

Patch

—

CVSS Score 9.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS Score 0.0007 21.6th percentile

Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-31862 is a critical-severity OS Command Injection (CWE-78) vulnerability in Cloudcli Cloud Cli. Its CVSS base score is 9.1 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 21.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

This vulnerability is AI-related — categorised as APIs and Models.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Requires validation of user-controlled parameters (file, branch, message, commit) prior to string interpolation in execAsync calls, directly preventing OS command injection in Git-related API endpoints.

SI-2 Flaw Remediation good match

prevent

Mandates timely identification, reporting, and correction of flaws like this command injection vulnerability, as evidenced by the patch in version 1.24.0.

AC-6 Least Privilege partial match

prevent

Enforces least privilege on the Cloud CLI process executing execAsync, limiting the scope and impact of arbitrary commands injected by high-privilege authenticated attackers.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1059 Command and Scripting Interpreter Execution

Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.

attack.mitre.org →

Why these techniques?

OS command injection in network-accessible Git API endpoints directly enables remote arbitrary command execution (T1059) via exploitation of a vulnerable application (T1190).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD 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, 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.

Deeper analysisAI

CVE-2026-31862 is an OS command injection vulnerability (CWE-78) in Cloud CLI, also known as Claude Code UI, a desktop and mobile user interface for Claude Code, Cursor CLI, Codex, and Gemini-CLI. Published on 2026-03-11, it affects versions prior to 1.24.0, where multiple Git-related API endpoints invoke execAsync() using string interpolation of user-controlled parameters including file, branch, message, and commit names. This flaw enables attackers to inject and execute arbitrary operating system commands.

The vulnerability carries a CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H), indicating exploitation is possible over the network with low complexity, no user interaction, and high privileges required, but with a changed scope leading to high impacts on confidentiality, integrity, and availability. Authenticated attackers with sufficient privileges can supply malicious payloads via the affected parameters to the API endpoints, achieving remote arbitrary command execution on the host system running the UI.

The issue is addressed in Cloud CLI version 1.24.0. Official mitigation involves updating to this patched release, as detailed in the GitHub security advisory (GHSA-f2fc-vc88-6w7q) and release notes (v1.24.0).