LiteLLM: Authenticated command execution via MCP stdio test endpoints
CISA confirma la explotación de esta vulnerabilidad en ataques reales. Prioriza comprobar si afecta a tu aplicación. CISA KEV · CC0 1.0
Impact
Two endpoints used to preview an MCP server before saving it — POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list — accepted a full server configuration in the request body, including the command, args, and env fields used by the stdio transport. When called with a stdio configuration, the endpoints attempted to connect, which spawned the supplied command as a subprocess on the proxy host with the privileges of the proxy process.
The endpoints were gated only by a valid proxy API key, with no role check. Any authenticated user — including holders of low-privilege internal-user keys — could therefore run arbitrary commands on the host.
Patches
Fixed in 1.83.7. Both test endpoints now require the PROXY_ADMIN role, bringing them into line with the save endpoint.
Workarounds
If upgrading is not immediately possible, developers should block POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list at their reverse proxy or API gateway.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | litellm | >= 1.74.2, < 1.83.7 | 1.83.7 |
Referencias
- https://github.com/BerriAI/litellm/security/advisories/GHSA-v4p8-mg3p-g94g
- https://nvd.nist.gov/vuln/detail/CVE-2026-42271
- https://github.com/BerriAI/litellm
- https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42271
- https://pypi.org/project/litellm
- https://github.com/advisories/GHSA-v4p8-mg3p-g94g
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-77, CWE-78- Plataforma
- Python (PyPI)
- Paquete
litellm- Publicada
- 25.04.2026
- Actualizado
- 11.10.2026 15:17
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-2599 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-v4p8-mg3p-g94g - CC BY 4.0
Historial de vulnerabilidades: litellm
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 42
- Primera → última
- 04.2024 09.2026
- Sin corrección
- 14
- Explotada en ataques
- 3
Distribución por gravedad
- Crítica 7
- Alta 17
- Media 8
- Baja 9
- Sin evaluar 1
Divulgaciones por año
- 2024: 8
- 2025: 6
- 2026: 28
-
LiteLLM: Authenticated command execution via MCP stdio test endpoints esta entrada
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