Skip to content
EXYS
Back to the CVEs

CVE-2026-59822

8.2, high Known exploited

BerriAI LiteLLM Improper Authentication Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
8.2, high high CVSS v3.1
EPSS, next 30 days
0.8% higher than 56.9% of scored CVEs
Exploitation
Confirmed in the wild
Published
8 Jul 20263 months ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 2 Sept 2026. US federal agencies had to remediate by 16 Sept 2026, a deadline that has passed.

Required action. Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

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.

Details

Vendor
BerriAI
Product
litellm
Weakness
CWE-287 (opens in a new tab)
Status
Analyzed
Updated
3 Sept 2026
Assigner
security-advisories@github.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

References 6

Patches and fixes 3

Advisories 1

Other references 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other BerriAI CVEs

Every BerriAI CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-42208 BerriAI LiteLLM SQL Injection Vulnerability KEV EPSS 6% 9.8, critical
  • CVE-2026-42271 BerriAI LiteLLM Command Injection Vulnerability KEV EPSS 93% 8.8, high

Beyond this page

Is CVE-2026-59822 in your network?

This page tells you how dangerous CVE-2026-59822 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2026-59822 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-59822 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.