CVE-2026-59822
BerriAI LiteLLM
BerriAI LiteLLM Improper Authentication Vulnerability
What it is
BerriAI LiteLLM contains an improper authentication vulnerability in the MCP Streamable HTTP endpoint that could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token.
What to do
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Vendor notices and references
- github.com/BerriAI/litellm/security/advisories/GHSA-7488-6r32-c95q
- nvd.nist.gov/vuln/detail/CVE-2026-59822
Description and required action as published by CISA. Full record at NVD.