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CVE-2026-49468

Litellm authentication bypass

9.8 CRITICALEPSS 3.03%
  1. Published22 Jun 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Litellm< 1.84.0

Remediation

Fixed in
Litellm≥ 1.84.0

References

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Frequently asked

Is CVE-2026-49468 being actively exploited?

CVE-2026-49468 is not in the CISA KEV catalog. Its EPSS exploit probability is 3.03%.

How severe is CVE-2026-49468?

CVE-2026-49468 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 3.03% probability of exploitation.

Which products are affected by CVE-2026-49468?

Affected products include Litellm.

How do I fix CVE-2026-49468?

Upgrade affected software to a fixed version, for example Litellm 1.84.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-49468 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.