Is CVE-2026-55531 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-55531?

CVE-2026-55531 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-55531

Description

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.