# CVE-2026-40111: MervinPraison PraisonAIAgents OS command injection in Memory Hooks Executor

Source: https://junglewise.ai/threats/cve-2026-40111-mervinpraison-praisonaiagents-os-command-injection-in-memory  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-09. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2026-40111 · Severity: critical · CVSS 8.8 · Published 2026-04-09

PraisonAIAgents is a framework for building and managing AI agents. A vulnerability in its memory hooks component allows an attacker to execute arbitrary system commands on the host machine. This can occur if an attacker can modify a configuration file or influence agent prompts, potentially leading to full system takeover, data theft, or persistent backdoors in automated environments.

Technologies: [MervinPraison PraisonAI Agents](https://junglewise.ai/threats/technologies/praisonai-agents), [Praisonaiagents](https://junglewise.ai/threats/technologies/praisonaiagents), [praisonaiagents (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonaiagents). Vendors: [MervinPraison](https://junglewise.ai/threats/vendors/mervinpraison), [Praison](https://junglewise.ai/threats/vendors/praison), [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-40111 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40111 being exploited in the wild.

**How severe is CVE-2026-40111?** Critical severity, with a CVSS score of 8.8, published 9 April 2026.

**Which products and versions are affected?** praisonaiagents (PyPI) ECOSYSTEM:introduced=0,fixed=1.5.128.

**Is there a fix for CVE-2026-40111?** Yes. praisonaiagents (PyPI): upgrade to 1.5.128 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-40111 attacked?** It is attacked with local access or over the network, in a software library.

**Am I affected by CVE-2026-40111?** Check whether you run MervinPraison PraisonAI Agents, 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 1.5.128 or later

  ```sh
  pip install "praisonaiagents>=1.5.128"
  ```


## Technical details

The vulnerability exists in `src/praisonai-agents/praisonaiagents/memory/hooks.py` where user-controlled command strings from `hooks.json` are passed directly to `subprocess.run()` with `shell=True`. The application lacks any sanitization or validation (such as `shlex.quote()` or allowlisting) for these commands. Attackers can exploit this via two surfaces: directly through hook event configurations or indirectly via prompt injection if an agent has file-write access to the workspace, allowing it to overwrite `.praisonai/hooks.json`. This enables arbitrary command execution with the privileges of the agent process and allows for persistent backdoors that trigger during standard lifecycle events like `BEFORE_TOOL` or `AFTER_TOOL`. A fix is available in version 1.5.128.

## Affected products

- MervinPraison praisonaiagents <= 1.5.126

## Identifiers

- CVE-2026-40111
- GHSA-v7px-3835-7gjx
- PYSEC-2026-487

## Timeline

- 2026-04-09: disclosed
- 2026-04-10: advisory: GHSA-v7px-3835-7gjx published
- 2026-04-10: patched: Fixed in version 1.5.128

## References

- [https://api.github.com/users/g0w6y](https://api.github.com/users/g0w6y)
- [https://github.com/g0w6y](https://github.com/g0w6y)
- [https://api.github.com/users/g0w6y/gists%7B/gist_id%7D](https://api.github.com/users/g0w6y/gists%7B/gist_id%7D)
- [https://api.github.com/users/g0w6y/repos](https://api.github.com/users/g0w6y/repos)
- [https://avatars.githubusercontent.com/u/192411347?v=4](https://avatars.githubusercontent.com/u/192411347?v=4)
- [https://api.github.com/users/g0w6y/events%7B/privacy%7D](https://api.github.com/users/g0w6y/events%7B/privacy%7D)

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