EUVD-2026-28507
GHSA-v4p8-mg3p-g94g
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
5DescriptionNVD
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.74.2 to before version 1.83.7, 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. This issue has been patched in version 1.83.7.
AnalysisAI
Remote command execution in LiteLLM proxy server versions 1.74.2 through 1.83.6 allows any authenticated user to execute arbitrary commands on the host system. Two MCP (Model Context Protocol) test endpoints accept stdio transport configurations including command, args, and env fields, then spawn the supplied command as a subprocess with proxy process privileges. …
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RemediationAI
Within 24 hours: Inventory all LiteLLM proxy deployments and confirm versions currently in use; restrict network access to proxy servers to trusted hosts only and review API key distribution practices. Within 7 days: Upgrade all instances to LiteLLM version 1.83.7 or later; rotate all API keys post-upgrade. …
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