CVE-2026-39890

PraisonAI is a multi-agent teams system. Prior to 4.5.115, the AgentService.loadAgentFromFile method uses the js-yaml library to parse YAML files without disabling dangerous tags (such as !!js/function and !!js/undefined). This allows an attacker to craft a malicious YAML file that, when parsed, executes arbitrary JavaScript code. An attacker can exploit this vulnerability by uploading a malicious agent definition file via the API endpoint, leading to remote code execution (RCE) on the server. This vulnerability is fixed in 4.5.115.

The following products are affected by CVE-2026-39890 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39890.

URL	Resource
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-32vr-5gcf-3pw2