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.
Metrics
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References
History
Wed, 08 Jul 2026 19:45:00 +0000
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| Description | LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, This vulnerability is fixed in 1.84.0. | 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. |
Wed, 24 Jun 2026 12:15:00 +0000
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threat_severity
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cvssV3_1
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Tue, 23 Jun 2026 15:30:00 +0000
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ssvc
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Tue, 23 Jun 2026 00:30:00 +0000
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Berriai
Berriai litellm |
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Berriai
Berriai litellm |
Mon, 22 Jun 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, This vulnerability is fixed in 1.84.0. | |
| Title | LiteLLM: Authentication Bypass via Host Header Injection | |
| Weaknesses | CWE-290 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-06-22T20:37:14.494Z
Updated: 2026-07-08T19:32:42.245Z
Reserved: 2026-05-30T04:17:43.094Z
Link: CVE-2026-49468
Updated: 2026-06-30T12:09:55.893Z
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