Hottest cybersecurity open-source tools of the month: May 2026

This content is a curated news summary highlighting several new open-source cybersecurity tools released or updated in May 2026. The tools address various security domains such as AI agent firewall enforcement (Pipelock), discovery and testing of exposed AI endpoints (AIMap), unified endpoint detection for Windows and Linux (Rustinel), autonomous bug hunting using LLMs (Sandyaa), autonomous pentesting (Lyrie), dependency vulnerability scanning (CVE Lite CLI), AI-powered vulnerability research (OpenHack), and AI-enhanced vulnerability scanning (Vigolium). The post itself is a link to an external article and does not describe a specific vulnerability or exploit. No direct security threat or vulnerability is detailed in this content.

• helpnetsecurity.com/2026/05/28/hottest-cybersecurity-open-source-tools-of-the-month-may-2026/ (opens in a new tab)
• reddit.com/r/cybersecurity/comments/1tpz5h1/hottest_cybersecurity_opensource_tools_of_the/ (opens in a new tab)

• php2shell one week later: Why one exploit doesn’t work everywhereHighVulnerability2026-10-30
• ZDI-26-839: MLflow PickleEvaluationArtifact Deserialization of Untrusted Data Remote Code Execution VulnerabilityHighVulnerability2026-10-29
• ZDI-26-843: MLflow SHAP load_explainer Deserialization of Untrusted Data Remote Code Execution VulnerabilityHighVulnerability2026-10-29
• ZDI-26-845: MLflow Statsmodels _load_model Deserialization of Untrusted Data Remote Code Execution VulnerabilityHighVulnerability2026-10-29
• Open-source tool for unpacking stripped Android native (.so) malware: static RegisterNatives recovery, ARM64 OLLVM (BR X8) deobfuscation, and Dobby anti-Frida tracingTool2026-10-28