Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Litellm | Litellm | < 1.84.0 |
Related Weaknesses (CWE)
References
- https://github.com/BerriAI/litellm/releases/tag/v1.84.0ProductRelease Notes
- https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3wMitigationPatchVendor 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
FAQ
What is CVE-2026-49468?
CVE-2026-49468 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 unauthent...
How severe is CVE-2026-49468?
CVE-2026-49468 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-49468?
Check the references section above for vendor advisories and patch information. Affected products include: Litellm Litellm.