Help Net Security newsletters: Daily and weekly news, cybersecurity jobs, open source projects, breaking news – subscribe here!

Please turn on your JavaScript for this page to function normally.
eye
OAuth marketplace apps keep access after publishers vanish

Installing an app from the Google Workspace Marketplace or GitHub Marketplace can grant a third party access to company email, files, calendars, code repositories, CI …

Agent Threat Rules
Agent Threat Rules: Open detection rule format for AI agent security threats

AI agents run inside coding assistants, MCP servers, and multi-agent frameworks, and the access that makes them useful also opens paths to prompt injection, tool poisoning, …

Agent Memory Guard
OWASP Agent Memory Guard: Stop AI agents from being weaponized through their own memory

AI agents keep memory across sessions. Conversation history, vector stores, scratchpads, and RAG indexes persist between runs, and anything written into that store becomes a …

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 …

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 …

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 …

OpenHack
OpenHack: Open-source AI-powered vulnerability research

Source-guided vulnerability research increasingly leans on coding harnesses such as Claude Code, Codex, and Cursor to drive agent-based reviews of application code. A new …

digital supply chain
GitHub, Grafana Labs breaches traced back to TanStack supply chain compromise

GitHub CISO Alexis Wales has named the malicious VS Code extension behind the breach they suffered at the hands of the threat group TeamPCP: Nx Console, a popular developer …

GitHub
TeamPCP breached GitHub’s internal codebase via poisoned VS Code extension

Following TeamPCP’s claim that they’ve breached GitHub’s own private code repositories, the Microsoft-owned company launched an investigation and confirmed …

CVE Lite CLI
CVE Lite CLI: Open-source dependency vulnerability scanner

Dependency vulnerability scanning in JavaScript and TypeScript projects has long sat at the end of the development pipeline. Pull requests get opened, continuous integration …

code
AI is drowning software maintainers in junk security reports

AI-assisted vulnerability research has exploded, unleashing a firehose of low-quality reports on overworked software maintainers who are wasting hours sifting through noise …

Lyrie
Lyrie: Open-source autonomous pentesting agent

Penetration testing has usually required weeks of manual work, specialized tooling, and teams with narrow skill sets. Lyrie, an open-source autonomous security agent built by …

Don't miss

Cybersecurity news
Daily newsletter sent Monday-Friday
Weekly newsletter sent on Mondays
Editor's choice newsletter sent twice a month
Periodical newsletter released when there is breaking news
Weekly newsletter listing new cybersecurity job positions
Monthly newsletter focusing on open source cybersecurity tools