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SOURCE-LINKED INTELLIGENCE

GHSA-v4p8-mg3p-g94g: LiteLLM: Authenticated command execution via MCP stdio test endpoints

OSV AI package advisories · observation · Apr 25, 2026 · UTC

### 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-priv

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recordType
vulnerability
status
active
evidenceStatus
reported
region
Global

Evidence & attribution

First collected: 2026-09-20T23:41:51.992Z. This is not the publication date.