BerriAI LiteLLM Improper Authentication Vulnerability

BerriAI LiteLLM

BerriAI LiteLLM contains an improper authentication vulnerability in the MCP Streamable HTTP endpoint that could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token. Added to CISA KEV on 2026-09-02 (federal deadline 2026-09-16).

First seen: 2 Sept 2026
Last update: 2 Sept 2026, 12:00 UTC
Identifiers: CVE-2026-59822
Source: CISA KEV
On the menu as: LLM gateways

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## BerriAI LiteLLM Improper Authentication Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: BerriAI LiteLLM
Ids: CVE-2026-59822

BerriAI LiteLLM contains an improper authentication vulnerability in the MCP Streamable HTTP endpoint that could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token. Added to CISA KEV on 2026-09-02 (federal deadline 2026-09-16).

## Steps
1. This incident involves a provider (ai-gateways). Search config, CI and env templates (.env.example, wrangler.toml, vercel.json, terraform, workflow secrets) for credentials stored there. List each secret by name, where it is used, and how to rotate it. Never print secret values.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-59822") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/BerriAI/litellm/security/advisories/GHSA-7488-6r32-c95q https://nvd.nist.gov/vuln/detail/CVE-2026-59822
https://pwned.coffee/i/berriai-litellm-improper-authentication-vulnerability-cve-2026-59822

Sources

Totalone hot coffee