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Vulnerabilities / CVE-2026-49468

critical

CVE-2026-49468

litellm: LiteLLM: Authentication Bypass via Host Header Injection

Published Modified CWE 290
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA9.5CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Red Hat8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD, GHSA. Rated lower by Red Hat (high).

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.

Affected packages and fixed versions

SourcePackageFixed in
pip::GitHub Security Advisory piplitellm1.84.0
chainguardairflow-2, airflow-32.11.2-r12 and 1 more
echo pip::Echo OSVlitellm1.84.0
minimosairflow-33.3.1-r0
seal pip::Seal Security Databaselitellm, seal-litellm1.80.11+sp999
wolfiairflow-33.2.2-r7
Show all 8 entries from 6 sources
SourcePackageFixed in
pip::GitHub Security Advisory piplitellm1.84.0
chainguardairflow-22.11.2-r12
chainguardairflow-33.2.2-r7
echo pip::Echo OSVlitellm1.84.0
minimosairflow-33.3.1-r0
seal pip::Seal Security Databaselitellm1.80.11+sp999
seal pip::Seal Security Databaseseal-litellm1.80.11+sp999
wolfiairflow-33.2.2-r7

References

All 12 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.