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Critical · 9.9 CVE-2026-57138 EUVD-2026-78420GHSA-vmmj-pfw7-fjwp

PraisonAI codeMode sandbox escape via Function constructor

Published Sep 15, 2026 · Updated Sep 17, 2026 · Assigned by GitHub_M

Description

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

VendorProductAffectedFixed
MervinPraison PraisonAI >= 1.4.0, < 1.7.2 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm praisonai >= 1.4.0, < 1.7.2 1.7.2 GHSA-vmmj-pfw7-fjwp

References