CVE-2026-57138: Mervinpraison Praisonai

Critical severity, CVSS 9.9. EPSS: 0.7% chance of exploitation in the next 30 days.

PraisonAI is a multi-agent teams system. From 1.4.0 until 1.7.2, codeMode in src/praisonai-ts/src/tools/builtins/code-mode.ts executes untrusted JavaScript with new Function() inside with(sandbox) and relies on a small source-code blocklist plus shadowed process and require properties. Code can use ({}).constructor.constructor to recover the real Function constructor, obtain process and process.mainModule.require, and reach host filesystem and subprocess APIs despite the advertised sandbox. Attackers who control codeMode input can read secrets, modify files, execute commands, or exhaust the host process. This issue is fixed in version 1.7.2.

Affected products

• Mervinpraison Praisonai: from 1.4.0, before 1.7.2 (fixed in 1.7.2)

Published 2026-09-15. Last modified 2026-09-17.