CVE-2026-35029: LiteLLM

High severity, CVSS 8.8. EPSS: 4% chance of exploitation in the next 30 days.

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.0, the /config/update endpoint does not enforce admin role authorization. A user who is already authenticated into the platform can then use this endpoint to modify proxy configuration and environment variables, register custom pass-through endpoint handlers pointing to attacker-controlled Python code, achieving remote code execution, read arbitrary server files by setting UI_LOGO_PATH and fetching via /get_image, and take over other privileged accounts by overwriting UI_USERNAME and UI_PASSWORD environment variables. Fixed in v1.83.0.

Affected products

• LiteLLM LiteLLM: before 1.83.0 (fixed in 1.83.0)

Published 2026-04-06. Last modified 2026-07-15.