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
“—” beside the score: it is equal to NVD's CVSS score.
Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-16. NVD baseline CVSS 9.8; sources differ by 0.0.
Also known asEUVD-2026-38361 (ENISA EUVD) · GHSA-4xpc-pv4p-pm3w (GitHub Security Advisories)Source: ENISA EUVD
- Public exploit or proof-of-concept code is available
A fix is available — apply it.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALmedium confidence
- EG Risk
- 75EG Risk 75/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 3.0%
- EPSS %ILE
- 87th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 3.0% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
June 16, 2026
Last Modified
October 25, 2026
Advisory Details (5)
Auto-updated Nov 2, 20262491520 – (CVE-2026-49468) CVE-2026-49468 litellm: LiteLLM: Authentication Bypass via Host Header Injection
https://bugzilla.redhat.com/show_bug.cgi?id=2491520CVE-2026-49468 - Red Hat Customer Portal
Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a
https://access.redhat.com/security/cve/CVE-2026-49468Authentication Bypass via Host Header Injection · Advisory · BerriAI/litellm · GitHub
https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3wv1.84.0
Patch available: BerriAI/litellm v1.84.0
https://github.com/BerriAI/litellm/releases/tag/v1.84.0Vendor Advisories for CVE-2026-49468(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| pip | litellm @ 1.84.0 (fixes < 1.84.0) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| litellm | 0.1.0 ... 1.9.dev0 (1119 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 16× in last 7d / 58× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 186 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 86 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 23:56 UTCEG score recompute
- 2026-11-01 23:56 UTCGHSA enrichmentGHSA-4xpc-pv4p-pm3w · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-11-01 07:46 UTCGHSA enrichmentGHSA-4xpc-pv4p-pm3w · GitHub severity CRITICAL · GitHub CVSS 9.8
- 2026-11-01 07:46 UTCEG score recompute
- 2026-10-31 21:47 UTCEG score recompute
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-30 19:37 UTCEG score recompute
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-29 17:14 UTCEG score recompute
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-28 15:05 UTCEG score recompute
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-27 05:40 UTCEG score recompute
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-25 23:27 UTCEG score recompute
- 2026-10-25 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-25 14:22 UTCEG score recompute
- 2026-10-25 01:52 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-23 23:43 UTCEG score recompute
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-22 21:33 UTCEG score recompute
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
Show 75 moreShow fewer
- 2026-10-21 19:21 UTCEG score recompute
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-20 17:11 UTCEG score recompute
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-19 15:01 UTCEG score recompute
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-18 03:34 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-17 10:41 UTCEG score recompute
- 2026-10-16 16:42 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-16 08:29 UTCEG score recompute
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-15 06:21 UTCEG score recompute
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-14 02:02 UTCEG score recompute
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-12 22:20 UTCEG score recompute
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-12 16:00 UTCEG score recompute
- 2026-10-11 19:43 UTCEG score recompute
- 2026-10-11 16:57 UTCEG score recompute
- 2026-10-11 14:21 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-03 15:49 UTCOSV refresh
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 3.0% · 87th percentile
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-09-14 03:27 UTCEG score recompute
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-30 22:42 UTCEG score recompute
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-24 23:22 UTCEG score recompute
- 2026-08-23 09:18 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-21 00:21 UTCEG score recompute
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-20 08:32 UTCEG score recompute
- 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-19 08:43 UTCEG score recompute
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-08-16 16:48 UTCEG score recompute
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.6% · 45th percentile
Publicly available exploits
(2 references)Public exploit code is referenced for this CVE (1 GitHub PoC), as is 1 Nuclei detection template. A detection template checks whether a system is affected; it is not necessarily exploit code. Defenders should treat patch urgency accordingly.
- Nucleihttp/cves/2026/CVE-2026-49468.yamlPublished Oct 2, 2026
LiteLLM Proxy < 1.84.0 - Host Header Authentication Bypass
Open source ↗ - GitHub PoCBiiTts/CVE-2026-49468-LiteLLM-Auth-BypassPublished Jul 3, 2026
CVE-2026-49468 — LiteLLM (<1.84.0) unauthenticated auth bypass via Host-header route confusion. PoC + docker lab.
Open source ↗
Related CVEs(same product + same CWE)
Same product
10 shownPyPI:litellm
- CVE-2026-114612EG 9.9CRITICAL
- CVE-2026-37004EG 9.8CRITICAL
- CVE-2026-12773EG 9.8CRITICAL
- CVE-2026-42208EG 9.8 KEVEPSS p100CRITICAL
- CVE-2024-5751EG 9.8CRITICAL
- CVE-2024-4264EG 9.8CRITICAL
- CVE-2024-2952EG 9.8CRITICAL
- CVE-2026-35030EG 9.1CRITICAL
- CVE-2026-59822NVD 8.2EG 9.0 KEVCRITICAL
- CVE-2026-42271NVD 8.8EG 9.0 KEVEPSS p100CRITICAL
Frequently asked(5)
What is CVE-2026-49468?
When was the CVE record for CVE-2026-49468 published?
Is CVE-2026-49468 actively exploited?
What is the CVSS score of CVE-2026-49468?
How do I remediate CVE-2026-49468?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49468
Is Your Infrastructure Affected by CVE-2026-49468?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.