CVE-2026-40287 PraisonAI has RCE via Automatic tools.py Import
Attackers can execute arbitrary code by placing a malicious tools.py file in the working directory, affecting PraisonAI users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40287?
CVE-2026-40287 is a high-severity code injection vulnerability in MervinPraison PraisonAI, published on 14 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
PraisonAI is a multi-agent teams system. Versions 4.5.138 and below are vulnerable to arbitrary code execution through automatic, unsanitized import of a tools.py file from the current working directory. Components including call.py (import_tools_from_file()), tool_resolver.py (_load_local_tools()), and CLI tool-loading paths blindly import ./tools.py at startup without any validation, sandboxing, or user confirmation. An attacker who can place a malicious tools.py in the directory where PraisonAI is launched (such as through a shared project, cloned repository, or writable workspace) achieves immediate arbitrary Python code execution in the host environment. This compromises the full PraisonAI process, the host system, and any connected data or credentials. This issue has been fixed in version 4.5.139.
Which versions are affected by CVE-2026-40287?
6 open source packages ship an affected version, including praisonaiagents, PraisonAI and praisonai. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
praisonaiagents PyPI | All versions | 1.5.140 |
praisonaiagents PyPI | All versions | 1.5.140 |
praisonaiagents PyPI | All versions | 1.5.140 |
PraisonAI PyPI | All versions | 4.5.139 |
praisonai PyPI | All versions | 4.5.139 |
praisonai PyPI | All versions | 4.5.139 |
Products include Praison Praisonai, Praison Praisonaiagents.
How do I fix CVE-2026-40287?
Upgrade praisonaiagents to 1.5.140 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-40287 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40287 exists.
Other vulnerabilities in MervinPraison PraisonAI
- CVE-2026-39888 PraisonAIAgents has a sandbox escape via exception frame traversal in `execute_code` (subprocess mode)
- CVE-2026-41497 Incomplete fix for CVE-2026-34935: Command Injection in MervinPraison/PraisonAI
- CVE-2026-40288 PraisonAI: Critical RCE via `type: job` workflow YAML
- CVE-2026-39890 PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading
- CVE-2026-34934 PraisonAI: Second-Order SQL Injection in `get_all_user_threads`
Sources
Also known as GHSA-g985-wjh9-qxxc, PYSEC-2026-2914, PYSEC-2026-2947.