CVE-2026-34938: PraisonAI: Python Sandbox Escape via str Subclass startswith() Override in execute_code

April 1, 2026 (updated April 6, 2026)

execute_code() in praisonai-agents runs attacker-controlled Python inside a three-layer sandbox that can be fully bypassed by passing a str subclass with an overridden startswith() method to the _safe_getattr wrapper, achieving arbitrary OS command execution on the host.

References

github.com/MervinPraison/PraisonAI
github.com/MervinPraison/PraisonAI/security/advisories/GHSA-6vh2-h83c-9294
github.com/advisories/GHSA-6vh2-h83c-9294
nvd.nist.gov/vuln/detail/CVE-2026-34938

Code Behaviors & Features

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