CVE-2026-59821: LiteLLM

High severity, CVSS 7.2. EPSS: 0.9% chance of exploitation in the next 30 days.

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.82.0-stable, LiteLLM's Custom Code Guardrails production create and update paths did not apply the same sandboxing and validation used by the test endpoint, allowing a privileged user with access to create or update guardrails to submit custom Python code that executed in the LiteLLM proxy environment and could expose secrets available to the process. This issue is fixed in version 1.82.0-stable.

Affected products

• LiteLLM LiteLLM: before 1.82.0 (fixed in 1.82.0); version 1.82.0 only

Published 2026-07-08. Last modified 2026-07-13.