CVE-2026-49468

Summary

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.

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3w ↗

Additional information

• NVD record
• https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3wPatch
• https://github.com/BerriAI/litellm/releases/tag/v1.84.0
• 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