CVE-2026-12771: LiteLLM

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability was identified in BerriAI litellm up to 1.82.2. This affects an unknown function of the file litellm/proxy/auth/user_api_key_auth.py of the component M2M JWT Handler. Such manipulation leads to improper authorization. The attack can be launched remotely. A high complexity level is associated with this attack. The exploitability is reported as difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.

Affected products

• LiteLLM LiteLLM: before 1.82.3 (fixed in 1.82.3)

Published 2026-06-21. Last modified 2026-06-24.