CVE-2026-55531: 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…

PriorityP428medium6.5CVSS 3.1

AVNACLPRNUIRSUCNINAH

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

2 ranges

Vendor	Product	Version range	Fixed in
mervinpraison	praisonai	< 4.6.58	4.6.58
mervinpraison	praisonai	>= 0 < 4.6.58	4.6.58

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