UNKNOWN CISA KEV

CVE-2026-59822

CVSS v3

—

Unknown

EPSS Score

0.8 %

exploit probability, as of 2026-10-19

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

litellmPyPIall versions · fixed in 1.84.0

Vendor advisories

CVE-2026-59822 Red Hat Product Security
litellm: LiteLLM: Unauthorized access due to authentication bypass

Full record on NVD

Description

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key validation with an empty UserAPIKeyAuth() object, allowing requests to reach MCP tooling without a valid LiteLLM key. This issue is fixed in version 1.84.0.

CISA Known Exploited Vulnerability

Date Added: 2026-09-02
Patch Due Date: 2026-09-16
Ransomware Use: Unknown

Technical details

Published: 2026-07-08
Last Modified: 2026-07-08
GitHub Advisory: GHSA-7488-6r32-c95q

Frequently asked questions

What is CVE-2026-59822?

Is CVE-2026-59822 actively exploited?

Yes. CVE-2026-59822 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-09-16.

What is the CVSS score for CVE-2026-59822?

A CVSS score has not been assigned to CVE-2026-59822 yet.

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