CVE Catalog

CVE-2026-55531

MediumCVSS 6.5
Published: Updated: Translated: NVD NIST

Summary

PraisonAI before version 4.6.58 has a vulnerability in the MCP HTTP Stream handler where the mcp_post handler creates a new _sessions entry for every initialize request but does not call _cleanup_sessions or enforce a maximum. An unauthenticated attacker can exhaust memory.

Risk Assessment

The risk is a denial of service attack by exhausting server memory, potentially leading to service unavailability.

Recommendation

Upgrade to version 4.6.58, which introduces session cleanup and limits via PRAISONAI_MCP_MAX_SESSIONS.

Other vulnerabilities in PraisonAI

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Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS