CVE-2026-59822
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.
Explotada activamente
- En el catálogo CISA de vulnerabilidades explotadas desde el 2 sept 2026
- Las agencias federales de EE. UU. deben corregirla antes del 16 sept 2026 (BOD 22-01)
- Atacada 1 día antes de que la vulnerabilidad se hiciera pública
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.
Fuente: CISA KEV · 2 sept 2026 2 sept 2026 27 ago 2026 26 jul 2026 8 jul 2026
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:NProductos afectados
| Fabricantes | Prodotto | Versioni |
|---|---|---|
| litellm | litellm | < 1.84.0 |
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This product uses the NVD API but is not endorsed or certified by the NVD.