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

Presented here is a curated selection of noteworthy open-source cybersecurity solutions that have drawn recognition for their ability to enhance security postures across …

cloud security
Companies built AI into core systems before figuring out how to govern it

70% of organizations use GenAI in live environments, and 64% have AI agents in pilot or production deployments. Some of those agents have privileged access to core systems, …

Linux
Canonical releases Workshop for one-command sandboxed dev environments on Ubuntu

Canonical released Workshop, a tool that launches sandboxed development environments on Ubuntu with a single command. Environments are configured once and reproduced on …

hand
AI chatbot recommendations lure users to cryptojacking malware sites

Cybercriminals are using AI chatbot interactions alongside poisoned search results to direct users to malicious download sites in an active cryptojacking campaign, Microsoft …

social engineering
Hackers are knocking on office doors pretending to be IT staff

The Silent Ransom Group (SRG) is targeting law firms using social engineering techniques and an unusual tactic for cybercriminals: showing up at victims’ offices in person …

Google
Google AI Threat Defense targets attackers using AI to find flaws faster

Google Cloud introduced AI Threat Defense, an automated cybersecurity platform that combines several of the company’s security assets to find, prioritize, and patch …

Claude
Claude now reviews and fixes vulnerabilities as you write code

Anthropic introduced a security-guidance plugin for Claude Code that reviews code changes for common vulnerabilities and helps Claude identify and fix issues during the same …

trojan
Fake ChatGPT and Claude installers on GitHub are dropping Deno RAT malware

Attackers are hosting counterfeit installers and plugins on GitHub and SourceForge that pose as widely used software, including ChatGPT, Claude, AutoTune, Kontakt, Ableton …

Apple
Apple makes its quantum-resistant encryption open source

Apple has published its post-quantum cryptography implementations in corecrypto, together with mathematical proofs and verification tools for independent expert evaluation, …

Malcolm Portelli
Coinflow CISO on crypto payments security under AI pressure

Crypto payment firms sit near the top of the target list for advanced persistent threat groups, and the workload on their security leaders keeps growing. Malcolm Portelli, …

Vigolium
Vigolium: Open-source vulnerability scanner

Vigolium, an open-source vulnerability scanner that combines deterministic scanning with AI-driven auditing, launched its initial open-source release this month. The project …

burnout
The alert economy is driving security analyst burnout

In this Help Net Security video, Ido Livneh, CEO of Jazz, explains why security analysts burn out and what leaders can do about it. The cause, he argues, is not long hours but …

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