CVE-2026-73222

CVE-2026-73222 · Claude Code Templates: Unauthenticated OS command injection (RCE) in Claude Code Studio server (--studio)

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Claude Code Templates is a CLI tool for configuring and monitoring Claude Code. Prior to 1.29.4, the Claude Code Studio server launched by the --studio option in cli-tool/src/sandbox-server.js binds to all interfaces on port 3444, permits cross-origin requests, and requires no authentication. The POST /api/execute endpoint passes the prompt request-body field to executeLocalTask(), and POST /api/install-agent passes the agentName request-body field to a child process. The same unsafe agent field path is reachable from /api/execute through checkAndInstallAgent(). These attacker-controlled values reach child_process.spawn() with shell execution enabled, causing Node.js to construct a shell command in which metacharacters are interpreted. An attacker who can reach the port directly, or who convinces a developer running Studio to visit a malicious website, can execute arbitrary operating-system commands with the developer's privileges and compromise source code, credentials, and local data. This issue is fixed in version 1.29.4.

CVSS 8.8 · Élevée · EPSS 0,3% · Correctif disponible

Publication

2026-08-11T18:27:09.297Z

Mise à jour

2026-08-13T13:54:28.645Z

Pile logicielle: node

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