CVE-2026-59822: LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated...

Added to the CISA Known Exploited Vulnerabilities catalog on 08 Jul 2026. Vendor: AI/ML. Product: LLM. CVSS score: 8.2.

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM ke...

Required action: Review and patch if applicable to your AI infrastructure.