LiteLLM: critical vulnerability

LiteLLM

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, a Host-header parsing flaw in the LiteLLM proxy could, under specific conditions, allow unauthenticated access to protected management routes.

Fix it

pip install --upgrade "litellm>=1.84.0"

First seen: 30 Oct 2026
Last update: 30 Oct 2026, 17:17 UTC
Fixed in: litellm 1.84.0
Identifiers: CVE-2026-49468
CVSS: 9.8
Source: news
On the menu as: LLM gateways
PyPI packages

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

## LiteLLM: critical vulnerability
Severity: critical. Patch status: patched.
Affected: LiteLLM
Fixed in: litellm 1.84.0
Ids: CVE-2026-49468

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, a Host-header parsing flaw in the LiteLLM proxy could, under specific conditions, allow unauthenticated access to protected management routes.

## Steps
1. Search every lockfile and manifest (package-lock.json, yarn.lock, pnpm-lock.yaml, requirements*.txt, poetry.lock, uv.lock, composer.lock, go.sum, Cargo.lock, Gemfile.lock) for `litellm`. For each hit, compare the installed version with the fix on the same major line: litellm 1.84.0. If it's lower, give the exact upgrade command for the package manager this repo uses.
2. 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.

## Fix by release line
| Line | State | Fix | Until then |
|---|---|---|---|
| litellm older than 1.84.0 | fixed | 1.84.0 | — |

## 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-2026-49468") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://github.com/BerriAI/litellm/releases/tag/v1.84.0 https://nvd.nist.gov/vuln/detail/CVE-2026-49468
https://pwned.coffee/i/litellm-security-advisory-cve-2026-49468

Timeline

30 Oct 2026, 17:17 UTC
Fix status: unknown → patched.
30 Oct 2026
First reported.

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
litellm (pip) < 1.84.0 1.84.0 GitHub advisory checked 30 Oct
Score: CVSS 9.8 (critical). CVSS 3.1 9.8 (NVD) for CVE-2026-49468
Last checked: 30 Oct 2026, 18:35 UTC

Product	Affected	Fixed in	Source
litellm (pip)	< 1.84.0	1.84.0	GitHub advisory checked 30 Oct

Sources: KEV – CVE record ✓ Vendor ✓

Sources

Wrong fix version, or a source we missed? Send it back to chef@pwned.coffee with the source, and we'll correct it here.

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