Resource exhaustion in Mervinpraison Praisonai
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 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 class: DoS (Denial of Service)
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Mervinpraison Praisonai — versions < 4.6.58
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-55531?
- CVE-2026-55531 is a medium-severity vulnerability in Mervinpraison Praisonai, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-08-25.
- How severe is CVE-2026-55531?
- Medium severity. CVSS v3 base score is 6.5 out of 10.