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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-49468)

According to its self-reported version, the instance of LiteLLM running on the remote web server is prior to 1.84.0. It is, therefore, affected by multiple vulnerabilities :

- An Authentication Bypass through OAuth2 Passthrough Fallback (CVE-2026-59822).

- An Authentication Bypass via Host Header Injection (CVE-2026-49468).

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
464576	Echo: litellm: security update to 1.84.0	Tenable Cloud Security	Echo Local Security Checks	Local	critical
464576	Echo: litellm: security update to 1.84.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	critical
115466	LiteLLM < 1.84.0 Multiple Vulnerabilities	Web App Scanning	Artificial Intelligence	Version Based	critical
443343	SCA: security update for litellm (GHSA-4xpc-pv4p-pm3w)	Tenable Cloud Security	SCA Checks	Local	critical
443343	SCA: security update for litellm (GHSA-4xpc-pv4p-pm3w)	Tenable Self-Hosted Container Security	SCA Checks	Local	critical

Detections

Analytics

CVE-2026-49468

critical

Tenable Plugins

critical

critical

critical

critical

critical