CVE-2026-55531

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductPraisonai

PublishedAug 25, 2026

First seenAug 25, 2026

Weakness typeCWE-400Uncontrolled resource consumption CWE-770Allocation of resources without limits

How to fix

Update

praisonai4.6.58 or later

Affected products

Product	Affected versions	Fixed in
praisonaiPyPI	v < 4.6.58	4.6.58

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