{"id":"CVE-2026-49468","aliases":["GHSA-4xpc-pv4p-pm3w","PYSEC-2026-388"],"url":"https://o3.security/vulnerability/CVE-2026-49468","summary":"LiteLLM: Authentication Bypass via Host Header Injection","details":"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.","published":"2026-06-22T20:37:14.494Z","modified":"2026-08-07T11:51:17.491629800Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"litellm","fixedVersion":"1.84.0"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/BerriAI/litellm/releases/tag/v1.84.0"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-49468.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-49468"},{"type":"ADVISORY","url":"https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3w"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49468.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49468"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491520"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:17.491629800Z"}}