SOURCE-LINKED INTELLIGENCE

GHSA-4jcj-7x88-m979: LiteLLM: MCP Proxy Has Improper Authentication

OSV AI package advisories · observation · Jun 21, 2026 · UTC

A weakness has been identified in BerriAI litellm up to 1.59.8. Affected is the function UserAPIKeyAuth of the file litellm/proxy/_experimental/mcp_server/auth/user_api_key_auth_mcp.py of the component MCP Proxy. Executing a manipulation can lead to improper authentication. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.

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recordType: vulnerability
status: active
evidenceStatus: reported
region: Global

Evidence & attribution

OSV AI package advisories · 2026-06-21T06:32:07.000Z

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