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CVE-2026-42271

8.7 high KEV · due 2026-06-22 exploit ×3 SSVC exploitation: active Analyzed
NVD · CVE.org · CISA KEV

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.

Fix

Public exploits 3

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

CISA KEV required action · due 2026-06-22

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Added to the catalog 2026-06-08. CISA KEV

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 8.7 · in KEV · litellm, redhatNVD modified 2026-10-26 20:10

Affected (CPE criteria) 3

  • cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:openshift_ai:*:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:openshift_ai:3.4:*:*:*:*:*:*:*

References 9