Critical 9.5Published Jun 22, 2026

CVE-2026-49468LiteLLM: Authentication Bypass via Host Header Injection

Updated under an hour ago (Oct 27, 2026, 7:23 PM ET)

Does this affect you?

It affects BerriAI litellm and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for BerriAI litellm

Exploited in the last 30 days

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: 9.5 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-290
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

BerriAI litellm berriai:litellm (from the name)	before 1.84.0	CNA record
Red Hat Exploit Intelligence redhat:exploit_intelligence	0	CISA ADP
Red Hat Red Hat Ansible Automation Platform 2 redhat:ansible_automation_platform	2	CISA ADP
Red Hat Red Hat OpenShift AI (RHOAI) redhat:openshift_ai	All versions	CISA ADP
litellm litellm litellm:litellm	before 1.84.0	NVD

References

References

https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3w	x-refsource-confirm, mitigation, patch, vendor-advisory
https://github.com/BerriAI/litellm/releases/tag/v1.84.0	x-refsource-misc, product, release-notes
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.