LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback
High-risk advisory
CVE-2026-59822
Summary
LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback
Why it matters
GitHub has published a reviewed security advisory for litellm. Prioritize it with other application dependency updates, especially because EPSS places it in the 16% percentile.
Operator check
Check whether litellm is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 8.8. EPSS probability: 0.2%; percentile: 16%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.