LiteLLM Custom Code Guardrail RCE via os.popen (CVE-2026-59821)

Arnold Chan@slaz

•updated Sep 12, 2026•0•0•2

Detects the creation or update of LiteLLM custom code guardrails that include suspicious Python snippets, specifically 'import os' and 'os.popen', which are indicative of attempts to execute arbitrary OS commands via guardrail logic (CVE-2026-59821).