CVE-2026-73222
Claude Code Templates: Unauthenticated OS command injection (RCE) in Claude Code Studio server (--studio)
Description
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.
INFO
Published Date :
Aug. 11, 2026, 7:18 p.m.
Last Modified :
Oct. 24, 2026, 3:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-73222
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update Claude Code Templates to version 1.29.4.
- Ensure the Claude Code Studio server is not exposed externally.
- Disable cross-origin requests if applicable.
- Implement authentication for Studio server access.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-73222.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-73222 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-73222
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-73222 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-73222 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Added Translation Title: claude-code-templates de davila7, Description: Claude Code Templates es una herramienta de CLI para configurar y monitorear Claude Code. Antes de la versión 1.29.4, el servidor de Claude Code Studio lanzado por la opción --studio en cli-tool/src/sandbox-server.js se enlaza a todas las interfaces en el puerto 3444, permite solicitudes de origen cruzado y no requiere autenticación. El endpoint POST /api/execute pasa el campo prompt del cuerpo de la solicitud a executeLocalTask(), y POST /api/install-agent pasa el campo agentName del cuerpo de la solicitud a un proceso hijo. La misma ruta de campo de agente insegura es accesible desde /api/execute a través de checkAndInstallAgent(). Estos valores controlados por el atacante llegan a child_process.spawn() con la ejecución de shell habilitada, haciendo que Node.js construya un comando de shell en el que se interpretan los metacaracteres. Un atacante que puede alcanzar el puerto directamente, o que convence a un desarrollador que ejecuta Studio para visitar un sitio web malicioso, puede ejecutar comandos arbitrarios del sistema operativo con los privilegios del desarrollador y comprometer el código fuente, las credenciales y los datos locales. Este problema está solucionado en la versión 1.29.4. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 13, 2026
Action Type Old Value New Value Added Reference https://github.com/davila7/claude-code-templates/security/advisories/GHSA-79wm-x847-7cvg Added SSVC {'id': 'CVE-2026-73222', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-13T13:54:20.643368Z'} -
New CVE Received by [email protected]
Aug. 11, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'davila7', 'product': 'claude-code-templates', 'versions': [{'status': 'affected', 'version': '< 1.29.4'}]}] Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-352 Added CWE CWE-78 Added CWE CWE-306 Added Reference https://github.com/davila7/claude-code-templates/blob/main/CHANGELOG.md Added Reference https://github.com/davila7/claude-code-templates/commit/bc4618b07232633c1c0aac12a43e436268d31783 Added Reference https://github.com/davila7/claude-code-templates/security/advisories/GHSA-79wm-x847-7cvg