CVE-2026-40111 PraisonAIAgents has an OS Command Injection via shell=True in Memory Hooks Executor (memory/hooks.py)
Attackers can execute arbitrary OS commands via unsanitized input in memory hooks, potentially gaining full control of the host system.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40111?
CVE-2026-40111 is a critical command injection vulnerability in MervinPraison PraisonAIAgents, published on 9 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-40111?
3 open source packages ship an affected version, including praisonaiagents. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
praisonaiagents PyPI | All versions | 1.5.128 |
praisonaiagents PyPI | All versions | 1.5.128 |
praisonaiagents PyPI | All versions | 1.5.128 |
Products include Praison Praisonaiagents.
How do I fix CVE-2026-40111?
Upgrade praisonaiagents to 1.5.128 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-40111 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40111 exists.
Other vulnerabilities in MervinPraison PraisonAIAgents
- CVE-2026-34938 PraisonAI: Python Sandbox Escape via str Subclass startswith() Override in execute_code
- CVE-2026-34954 PraisonAI: SSRF in FileTools.download_file() via Unvalidated URL
- CVE-2026-34937 PraisonAI: Shell Injection in run_python() via Unescaped $() Substitution
- CVE-2026-44335 SSRF bypass in PraisonAI
- CVE-2026-40150 PraisonAIAgents has SSRF and Local File Read via Unvalidated URLs in web_crawl Tool
Sources
Also known as GHSA-v7px-3835-7gjx, PYSEC-2026-487.