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. The auth layer derived the effective route from request.url.path in litellm/proxy/auth/auth_utils.py::get_request_route(), which Starlette reconstructs from the Host header. A crafted Host could therefore make the auth gate evaluate a different route from the one FastAPI dispatched. This vulnerability is fixed in 1.84.0.
Fix
Public exploits 1
- BiiTts/CVE-2026-49468-LiteLLM-Auth-Bypass PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 1
- https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3w Mitigation, Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 9.5 · litellmNVD modified 2026-10-25 23:10
Affected (CPE criteria) 1
cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*
References 5
- https://github.com/BerriAI/litellm/releases/tag/v1.84.0 Product, Release Notes
- https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3w Mitigation, Patch, Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-49468
- https://bugzilla.redhat.com/show_bug.cgi?id=2491520
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49468.json