CVE-2026-57138 PraisonAI codeMode sandbox escape via Function constructor
Attackers can escape the codeMode sandbox in PraisonAI to execute arbitrary code, read secrets, and modify files on the host system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-57138?
CVE-2026-57138 is a critical code injection vulnerability in MervinPraison PraisonAI, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-57138?
2 open source packages ship an affected version, including praisonai.
| Package | Affected | Fixed in |
|---|---|---|
praisonai npm | From 1.4.0 | 1.7.2 |
praisonai npm | From 1.4.0 | 1.7.2 |
How do I fix CVE-2026-57138?
Upgrade praisonai to 1.7.2 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-57138 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57138 exists.
Sources
Also known as GHSA-vmmj-pfw7-fjwp.