Paper/Archive/CVE-2026-47392

CVE-2026-47392

MervinPraison PraisonAI — PraisonAI vulnerable to sandbox escape via `print.__self__` builtins module leak in `execute_code` (subprocess mode)

EPSS 0.9%public exploit CVSS 9.9

critical.is priorityof 100

CVSS 9.9 (CNA)9.9 / 10 × 3029.7 Not in CISA KEV+300.0 EPSS percentile 59.2.592 × 2011.8 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

PraisonAI is a multi-agent teams system. Prior to version 4.6.40 of PraisonAI, corresponding to version 1.6.40 of praisonaiagents, `execute_code()` in `praisonaiagents/tools/python_tools.py` (v1.6.37, subprocess sandbox mode) can be fully bypassed using `print.__self__` to retrieve the real Python `builtins` module, from which `__import__` can be extracted via `vars()` and runtime string construction. This achieves arbitrary OS command execution on the host, completely defeating the sandbox. This is a novel bypass that survives all patches for CVE-2026-39888 (frame traversal), CVE-2026-34938 (str subclass), and CVE-2026-40158 (`type.__getattribute__` trampoline). PraisonAI version 4.6.40 and praisonaiagents version 1.6.40 contain an updated fix.

Affected

ProductAffectedFixed inSource

PraisonAI< 4.6.40–CNA

< 1.6.40praisonaiagents–CNA

Scores by source

GitHub_M (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/MervinPraison/PraisonAI/security/advisories/GHSA-4mr5-g6f9-cfrh refgithub.com/MervinPraison/PraisonAI/pull/1684 refgithub.com/MervinPraison/PraisonAI/commit/b0d8f777528f3253a0cfb0a3ef65455da6ae32f6