AI agent vulnerability · LiteLLM

CVE-2026-12771: LiteLLM: M2M JWT Handler Has Improper Authorization

lowCVSS 4.0 1.3 · 3.1 5.0GHSA-qmf3-4767-5fg3

A vulnerability was identified in BerriAI litellm up to 1.82.2. This affects an unknown function of the file litellm/proxy/auth/userapikeyauth.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.

Published Jun 21, 2026 · Updated Sep 10, 2026

Affected packages

litellm

Ecosystem: PyPI
Affected: <= 1.82.2
Fixed in: No patched version yet
Check: pip show litellm

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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