CVE-2026-49468Network attack vectorHinoki check available

Unauthenticated management-route access via Host spoofing

Published Jun 22, 2026 · Updated Jun 22, 2026

Authentication bypass in BerriAI LiteLLM before 1.84.0 allows remote attackers to access protected management routes via a crafted Host header. The get_request_route function uses request.url.path, which Starlette reconstructs from Host, so authentication checks a different path than FastAPI dispatches. Only self-hosted proxies reached without upstream Host validation are exposed; LiteLLM Cloud and normalized deployments block the bypass.

CVSS severity9.5
Critical
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Authentication bypass in BerriAI LiteLLM before 1.84.0 allows remote attackers to access protected management routes via a crafted Host header. The get_request_route function uses request.url.path, which Starlette reconstructs from Host, so authentication checks a different path than FastAPI dispatches. Only self-hosted proxies reached without upstream Host validation are exposed; LiteLLM Cloud and normalized deployments block the bypass.

The record

CVE
CVE-2026-49468
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
Berri AI
Product
LiteLLM
Classifications
CWE-290, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.84.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Berri AI · LiteLLMversion=< 1.84.0

Published CVSS scores

9.5GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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