CVE-2026-34937
Received Received - Intake
Command Injection in PraisonAI run_python() via Improper Shell Escaping

Publication date: 2026-04-03

Last updated on: 2026-04-14

Assigner: GitHub, Inc.

Description
PraisonAI is a multi-agent teams system. Prior to version 1.5.90, run_python() in praisonai constructs a shell command string by interpolating user-controlled code into python3 -c "<code>" and passing it to subprocess.run(..., shell=True). The escaping logic only handles \ and ", leaving $() and backtick substitutions unescaped, allowing arbitrary OS command execution before Python is invoked. This issue has been patched in version 1.5.90.
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Meta Information
Published
2026-04-03
Last Modified
2026-04-14
Generated
2026-06-16
AI Q&A
2026-04-04
EPSS Evaluated
2026-06-14
NVD
CVE-2026-34937
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
praison praisonaiagents to 1.5.90 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
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Executive Summary

The vulnerability exists in PraisonAI versions prior to 1.5.90 in the run_python() function. This function constructs a shell command string by inserting user-controlled code into a python3 -c "<code>" command and then executes it using subprocess.run with shell=True. The escaping logic only protects backslashes and double quotes, but fails to escape $() and backtick substitutions. This flaw allows an attacker to execute arbitrary operating system commands before the Python code runs.

Impact Analysis

This vulnerability can lead to arbitrary OS command execution with the privileges of the process running PraisonAI. An attacker could exploit this to execute malicious commands, potentially leading to full system compromise, data theft, data modification, or denial of service.

Mitigation Strategies

The vulnerability has been patched in PraisonAI version 1.5.90. The immediate step to mitigate this vulnerability is to upgrade PraisonAI to version 1.5.90 or later.

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