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.

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

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, Praisonaiagents, praisonaiagents (PyPI). Vendors: MervinPraison, Praison, 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
```
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

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