Exploitation active confirmée

Ajoutée au catalogue CISA KEV le 02/09/2026, correctif exigé avant le 16/09/2026 pour les agences fédérales américaines.

Action requise : 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 officielle (NVD)

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.

Preuves de concept publiques (1)

Dépôts tiers non vérifiés, parfois piégés. Ne les exécutez jamais en production : uniquement dans un environnement de test isolé.

HORKimhab/CVE-2026-59822 · ★ 0 · 03/09/2026
CVE-2026-59822 - Draft or TODO

Références

https://github.com/BerriAI/litellm/commit/73869f0faf7d11ee21adcb5f91b8c33a340b6c2c , Patch
https://github.com/BerriAI/litellm/pull/26463 , Issue Tracking, Patch
https://github.com/BerriAI/litellm/releases/tag/v1.84.0 , Product, Release Notes
https://github.com/BerriAI/litellm/security/advisories/GHSA-7488-6r32-c95q , Mitigation, Patch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-59822 , US Government Resource
https://www.wiz.io/blog/ai-infrastructure-honeypot , Third Party Advisory

En bref

Éditeur	BerriAI
Produit	LiteLLM
Publiée le	08/07/2026
Modifiée le	03/09/2026
CVSS	8.8 (v4.0)
EPSS	0,84 % (centile 57)
CWE	CWE-287, CWE-306

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS : probabilité estimée d'exploitation dans les 30 prochains jours.