CVE-2026-56076 — PraisonAI Cross-Origin Agent Execution Vulnerability Guide 2026
CVE-2026-56076 is a high-severity (CVSS 8.6 v4) cross-origin agent execution vulnerability in PraisonAI versions before 1.5.128. The POST /agui endpoint combines three failures — no authentication, hardcoded Access-Control-Allow-Origin: *, and Starlette’s Content-Type-agnostic JSON parsing — that lets any website a victim visits silently execute arbitrary agent commands with full tool access and exfiltrate the results. This guide explains the vulnerability chain, attack scenario, real-world impact, and the complete remediation path for teams running PraisonAI in development or production. ...