CVE-2026-49468

critical

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.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49468.json

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

https://github.com/BerriAI/litellm/releases/tag/v1.84.0

https://bugzilla.redhat.com/show_bug.cgi?id=2491520

https://access.redhat.com/security/cve/CVE-2026-49468

Details

Source: Mitre, NVD

Published: 2026-06-22

Updated: 2026-07-15

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

CVSS v4

Base Score: 9.5

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Severity: Critical

EPSS

EPSS: 0.00062