Is CVE-2026-34938 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34938 being exploited in the wild.

How severe is CVE-2026-34938?

Critical severity, with a CVSS score of 10, published 3 April 2026.

Which products and versions are affected?

praisonaiagents (PyPI) ECOSYSTEM:introduced=0,fixed=1.5.90.

Is there a fix for CVE-2026-34938?

Yes. praisonaiagents (PyPI): upgrade to 1.5.90 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-34938 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-34938?

Check whether you run Praisonaiagents or praisonaiagents (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-34938: MervinPraison PraisonAI sandbox escape in execute_code

CVE-2026-34938 · Severity: critical · CVSS 10 · Published 2026-04-03

PraisonAI is a framework for managing teams of AI agents. A security flaw in its code execution component allows an attacker to bypass built-in safety restrictions and run unauthorized commands on the underlying server. This could lead to a total system takeover, theft of sensitive data, or disruption of operations, especially in deployments where AI agents are configured to run tasks automatically without human approval.

Technologies: Praisonaiagents, praisonaiagents (PyPI). Vendors: Praison, PyPI.

Quick answers

Is CVE-2026-34938 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34938 being exploited in the wild.
How severe is CVE-2026-34938?: Critical severity, with a CVSS score of 10, published 3 April 2026.
Which products and versions are affected?: praisonaiagents (PyPI) ECOSYSTEM:introduced=0,fixed=1.5.90.
Is there a fix for CVE-2026-34938?: Yes. praisonaiagents (PyPI): upgrade to 1.5.90 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-34938 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-34938?: Check whether you run Praisonaiagents or praisonaiagents (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

praisonaiagents (PyPI): upgrade to 1.5.90 or later
```
pip install "praisonaiagents>=1.5.90"
```

Technical details

A sandbox escape vulnerability exists in the 'execute_code' function of the praisonai-agents package. The vulnerability stems from a logic error in the '_safe_getattr' wrapper, which attempts to block access to sensitive attributes (those starting with underscores) using 'name.startswith('_')'. Because the wrapper accepts any 'str' subclass, an attacker can provide a custom string object with a malicious 'startswith' method that always returns 'False', bypassing the security check. By leveraging 'type()' (which is permitted in the sandbox) to create this subclass, an attacker can access '__subclasses__' and other internal attributes to reach the 'subprocess.Popen' class. This allows for arbitrary OS command execution with the privileges of the application process. The issue is particularly severe in 'autonomy_mode' where 'PRAISONAI_AUTO_APPROVE' is enabled by default. The vulnerability is patched in version 1.5.90.

Affected products

MervinPraison PraisonAI (praisonai-agents) < 1.5.90

Identifiers

CVE-2026-34938
GHSA-6vh2-h83c-9294
PYSEC-2026-484

Timeline

2026-03-31: advisory: Vendor advisory published on GitHub
2026-04-03: disclosed: CVE published to NVD
2026-04-03: patched: Fix released in version 1.5.90

References

https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-6vh2-h83c-9294

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