critical9.8
CVE-2026-49468
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | litellm | < 1.84.0 | 1.84.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Litellm | Litellm | before 1.84.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-4xpc-pv4p-pm3w
- https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3w
- https://github.com/BerriAI/litellm/releases/tag/v1.84.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-49468
- https://access.redhat.com/security/cve/CVE-2026-49468
- https://bugzilla.redhat.com/show_bug.cgi?id=2491520
- https://github.com/BerriAI/litellm
- https://github.com/pypa/advisory-database/tree/main/vulns/litellm/PYSEC-2026-388.yaml
- https://pypi.org/project/litellm
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49468.json