CVE-2026-55531: Mervinpraison Praisonai

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

PraisonAI is a multi-agent teams system. Prior to praisonai 4.6.58, the MCP HTTP Stream mcp_post handler creates a new _sessions entry for every initialize request but does not call _cleanup_sessions or enforce a maximum. An unauthenticated caller can exhaust memory. The fix invokes cleanup and limits sessions through PRAISONAI_MCP_MAX_SESSIONS. This issue is fixed in version 4.6.58.

Affected products

• Mervinpraison Praisonai: before 4.6.58 (fixed in 4.6.58)

Published 2026-08-25. Last modified 2026-09-09.