CVE-2026-49468

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” 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.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this weekElevated

Also known asEUVD-2026-38361 (ENISA EUVD) · GHSA-4xpc-pv4p-pm3w (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 3.0%CVSS: 9.8Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

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 v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG 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, 2026
Patch available. Sources: github_release, github, redhat.
Red Hat

2491520 – (CVE-2026-49468) CVE-2026-49468 litellm: LiteLLM: Authentication Bypass via Host Header Injection

https://bugzilla.redhat.com/show_bug.cgi?id=2491520
Red HatMentions a patch (unverified)

CVE-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-2026-49468
GitHub advisoryMentions a patch (unverified)

Authentication Bypass via Host Header Injection · Advisory · BerriAI/litellm · GitHub

https://github.com/BerriAI/litellm/security/advisories/GHSA-4xpc-pv4p-pm3w
GitHub release Patch Available

v1.84.0

Patch available: BerriAI/litellm v1.84.0

https://github.com/BerriAI/litellm/releases/tag/v1.84.0

Vendor 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 / EcosystemFix (by version range) / PatchReleasedSource
piplitellm @ 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)
PackageVulnerable rangeFix by version rangeDependents
litellm0.1.0 ... 1.9.dev0 (1119 versions)
  • every version up to 1.84.0: fixed in 1.84.0
—

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.

  1. 2026-11-01 23:56 UTCEG score recompute
  2. 2026-11-01 23:56 UTCGHSA enrichmentGHSA-4xpc-pv4p-pm3w · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-01 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  4. 2026-11-01 07:46 UTCGHSA enrichmentGHSA-4xpc-pv4p-pm3w · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-11-01 07:46 UTCEG score recompute
  6. 2026-10-31 21:47 UTCEG score recompute
  7. 2026-10-31 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  8. 2026-10-30 19:37 UTCEG score recompute
  9. 2026-10-30 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  10. 2026-10-29 17:14 UTCEG score recompute
  11. 2026-10-29 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  12. 2026-10-28 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  13. 2026-10-28 15:05 UTCEG score recompute
  14. 2026-10-27 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  15. 2026-10-27 05:40 UTCEG score recompute
  16. 2026-10-26 16:31 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  17. 2026-10-25 23:27 UTCEG score recompute
  18. 2026-10-25 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  19. 2026-10-25 14:22 UTCEG score recompute
  20. 2026-10-25 01:52 UTCEG score recompute
  21. 2026-10-24 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  22. 2026-10-23 23:43 UTCEG score recompute
  23. 2026-10-23 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  24. 2026-10-22 21:33 UTCEG score recompute
  25. 2026-10-22 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
Show 75 more
  1. 2026-10-21 19:21 UTCEG score recompute
  2. 2026-10-21 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  3. 2026-10-20 17:11 UTCEG score recompute
  4. 2026-10-20 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  5. 2026-10-19 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  6. 2026-10-19 15:01 UTCEG score recompute
  7. 2026-10-18 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  8. 2026-10-18 03:34 UTCEG score recompute
  9. 2026-10-17 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  10. 2026-10-17 10:41 UTCEG score recompute
  11. 2026-10-16 16:42 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  12. 2026-10-16 08:29 UTCEG score recompute
  13. 2026-10-15 16:32 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  14. 2026-10-15 06:21 UTCEG score recompute
  15. 2026-10-14 16:33 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  16. 2026-10-14 02:02 UTCEG score recompute
  17. 2026-10-13 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  18. 2026-10-12 22:20 UTCEG score recompute
  19. 2026-10-12 16:34 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  20. 2026-10-12 16:00 UTCEG score recompute
  21. 2026-10-11 19:43 UTCEG score recompute
  22. 2026-10-11 16:57 UTCEG score recompute
  23. 2026-10-11 14:21 UTCEG score recompute
  24. 2026-10-11 13:49 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  25. 2026-10-10 20:00 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  26. 2026-10-09 20:07 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  27. 2026-10-08 17:12 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  28. 2026-10-07 23:48 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  29. 2026-10-06 15:18 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  30. 2026-10-05 17:43 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  31. 2026-10-04 23:22 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  32. 2026-10-03 15:49 UTCOSV refresh
  33. 2026-10-03 14:25 UTCEPSS rescoreEPSS 3.0% · 87th percentile
  34. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  35. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  36. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  37. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  38. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  39. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  40. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  41. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  42. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  43. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  44. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  45. 2026-09-14 03:27 UTCEG score recompute
  46. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  47. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  48. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  49. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  50. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  51. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  52. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  53. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  54. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  55. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  56. 2026-08-30 22:42 UTCEG score recompute
  57. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  58. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  59. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  60. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  61. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  62. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  63. 2026-08-24 23:22 UTCEG score recompute
  64. 2026-08-23 09:18 UTCEG score recompute
  65. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  66. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  67. 2026-08-21 00:21 UTCEG score recompute
  68. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  69. 2026-08-20 08:32 UTCEG score recompute
  70. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  71. 2026-08-19 08:43 UTCEG score recompute
  72. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  73. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  74. 2026-08-16 16:48 UTCEG score recompute
  75. 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.yaml
    Published Oct 2, 2026

    LiteLLM Proxy < 1.84.0 - Host Header Authentication Bypass

    Open source ↗
  • GitHub PoCBiiTts/CVE-2026-49468-LiteLLM-Auth-Bypass
    Published Jul 3, 2026

    CVE-2026-49468 — LiteLLM (<1.84.0) unauthenticated auth bypass via Host-header route confusion. PoC + docker lab.

    Open source ↗

Frequently asked(5)

What is CVE-2026-49468?
CVE-2026-49468 is a critical-severity vulnerability; its CVE record was published on June 16, 2026. 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…
When was the CVE record for CVE-2026-49468 published?
The CVE record for CVE-2026-49468 was published on June 16, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 25, 2026; the record at its source may have been updated since.
Is CVE-2026-49468 actively exploited?
CVE-2026-49468 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.0% probability of exploitation in the next 30 days (87th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49468?
CVE-2026-49468 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-49468?
A fix for CVE-2026-49468 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49468 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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