CVE-2026-57124: Mervinpraison Praisonai

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

PraisonAI is a multi-agent teams system. Prior to 4.6.59, the default UI host applications expose POST /api/mcp/connect without mandatory authentication and accept caller-controlled command and args values that PraisonAIUI passes to StdioMCPClient to start a local process. Because the UI commands bind to 0.0.0.0 by default, a reachable unauthenticated client can execute commands as the UI service account even when the MCP handshake later fails. This vulnerability is fixed in 4.6.59.

Affected products

• Mervinpraison Praisonai: before 4.6.59 (fixed in 4.6.59)

Published 2026-09-14. Last modified 2026-09-15.