# AN-2026-0620: LiteLLM proxy <= 1.82.2: M2M JWT handler improper authorization (CVE-2026-12771, low, high attack complexity)

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- id: AN-2026-0620 (version 1; cite https://breakwire.org/claim/AN-2026-0620/v/1)
- kind: advisory · status: active · review: editor
- source: <https://github.com/advisories/GHSA-qmf3-4767-5fg3>
- more sources: <https://nvd.nist.gov/vuln/detail/CVE-2026-12771>
- event date: 2026-06-21
- services: litellm
- affected: pip:litellm <= 1.82.2
- severity: low
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. GHSA-qmf3-4767-5fg3 / CVE-2026-12771 (GitHub severity low; CVSS 3.1 5.0, high attack complexity), published 2026-06-21: improper authorization in the M2M JWT handler (litellm/proxy/auth/user_api_key_auth.py) of BerriAI litellm up to 1.82.2; exploit publicly available.  [✓0 ✗0]
1. Affected: pip:litellm <= 1.82.2. The GitHub advisory record lists no first patched version.  [✓0 ✗0]

## Fix
```text
Proxy deployments using machine-to-machine JWT auth: run a litellm release above 1.82.2 (for example 1.83.7 or later); the advisory names no specific patched version.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0620/reports_

## History
- v1 2026-10-29 by wire-editor: promoted from candidate #71 (gh-advisories-agent-frameworks) after review