MervinPraison PraisonAIAgents up to 1.5.127 Configuration hooks.py subprocess.run os command injection

Summaryinfo

A vulnerability was found in MervinPraison PraisonAIAgents up to 1.5.127. It has been classified as critical. This issue affects the function subprocess.run of the file src/praisonai-agents/praisonaiagents/memory/hooks.py of the component Configuration Handler. This manipulation causes os command injection. This vulnerability is tracked as CVE-2026-40111. The attack is restricted to local execution. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in MervinPraison PraisonAIAgents up to 1.5.127. It has been declared as critical. Affected by this vulnerability is the function subprocess.run of the file src/praisonai-agents/praisonaiagents/memory/hooks.py of the component Configuration Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

PraisonAIAgents is a multi-agent teams system. Prior to 1.5.128, he memory hooks executor in praisonaiagents passes a user-controlled command string directly to subprocess.run() with shell=True at src/praisonai-agents/praisonaiagents/memory/hooks.py. No sanitization is performed and shell metacharacters are interpreted by /bin/sh before the intended command executes. Two independent attack surfaces exist. The first is via pre_run_command and post_run_command hook event types registered through the hooks configuration. The second and more severe surface is the .praisonai/hooks.json lifecycle configuration, where hooks registered for events such as BEFORE_TOOL and AFTER_TOOL fire automatically during agent operation. An agent that gains file-write access through prompt injection can overwrite .praisonai/hooks.json and have its payload execute silently at every subsequent lifecycle event without further user interaction. This vulnerability is fixed in 1.5.128.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-40111 since 04/09/2026. The exploitation appears to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 1.5.128 eliminates this vulnerability.

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Productinfo

Vendor

• MervinPraison

Name

• PraisonAIAgents

Version

• 1.5.127

CPE 2.3info

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CPE 2.2info

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