CVE-2026-42271
LiteLLM: Authenticated command execution via MCP stdio test endpoints
描述
### 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.
如何修補 CVE-2026-42271
要修補 CVE-2026-42271,請將受影響套件升級到下列已修補版本。
- —升級至 1.83.7 或更新版本
- —升級至 1.83.7 或更新版本
CVE-2026-42271 正在被利用嗎?
是 — CVE-2026-42271 已列入 CISA Known Exploited Vulnerabilities (KEV) 清單,代表正在被實際利用,請立即修補。
受影響套件(2)
- >= 1.74.2, < 1.83.7
- >= 1.74.2, < 1.83.7