Hottest Cybersecurity Open-Source Tools of the Month: May 2026
Help Net Security, Thursday, May 28th, 2026
A curated selection of noteworthy open-source cybersecurity tools released in May 2026.
Help Net Security presents seven notable open-source cybersecurity tools from May 2026, including Pipelock (an AI agent firewall), AIMap (which finds exposed AI endpoints), Rustinel (cross-platform endpoint detection), Sandyaa (autonomous security bug hunter using LLMs), Lyrie (autonomous pentesting agent), CVE Lite CLI (dependency vulnerability scanner), and OpenHack (AI-powered vulnerability research).
These tools address various security challenges across different environments and development workflows. The selection demonstrates the open-source community's efforts to democratize advanced security capabilities for defenders managing diverse infrastructure and development pipelines.