CVE-2026-49468
A public proof of concept exists; no exploitation attested.
- Published2026-06-22
- Fixed in1.84.0
- WeaknessCWE-290
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
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.
Timeline
dates in UTC- 2026-06-2221:16CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-49468?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-49468?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.84 | < 1.84.0 | 1.84.0 | NVD · OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Litellm to 1.84.0
Advisories and patches
- github.comRelease Notes
- github.comMitigation · Patch · Vendor Advisory
Detection
read 2026-10-23 19:25 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 1 repository, unverifiedBiiTts/CVE-2026-49468-LiteLLM-Auth-Bypass PoC-in-GitHub
Sources
- CISA-ADPSSVC decisionnone2026-06-23
- OpenCVESSVC decisionnone—
- CNACVSS 4.09.5read 2026-10-23
- CNACVSS 3.18.1read 2026-10-23
- NVDCVSS 3.19.8read 2026-10-23
- CNAweakness (CWE)CWE-290read 2026-10-23
- FIRST EPSSEPSS score3.0 %2026-10-22
- PoC-in-GitHubproof of concept1read 2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 4.0 vector
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Published
- 2026-06-22
- Last Modified
- 2026-07-15
- NVD status
- Modified
Frequently asked questions
What is CVE-2026-49468?
Is CVE-2026-49468 actively exploited?
What is the CVSS score for CVE-2026-49468?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.