{"cve":"CVE-2026-49468","nvd":{"published":"2026-06-22T21:16:25.190","modified":"2026-10-25T23:10:00.167","status":"Modified","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_v4":{"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","score":9.5},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-290"],"references":["https://github.com/BerriAI/litellm/releases/tag/v1.84.0","https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3w","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"],"products":["litellm:litellm"],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-49468","score":0.03033,"percentile":0.87395,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-4xpc-pv4p-pm3w","url":"https://osv.dev/vulnerability/GHSA-4xpc-pv4p-pm3w","summary":"LiteLLM: Authentication Bypass via Host Header Injection","modified":"2026-09-10T03:50:48.301716737Z","packages":[{"ecosystem":"PyPI","name":"litellm","purl":"pkg:pypi/litellm","ranges":["<1.84.0"],"fixed":["1.84.0"]}]},{"id":"PYSEC-2026-388","url":"https://osv.dev/vulnerability/PYSEC-2026-388","summary":"LiteLLM: Authentication Bypass via Host Header Injection","modified":"2026-07-01T20:22:56.295059Z","packages":[{"ecosystem":"PyPI","name":"litellm","purl":"pkg:pypi/litellm","ranges":["<1.84.0"],"fixed":["1.84.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}