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Java
Java library vulnerabilities: IBM and Red Hat fix 400+ previously unknown flaws

IBM and Red Hat have found and fixed more than 400 previously unknown vulnerabilities in widely used Java libraries through Lightwell, their program for patching open source …

AI Agent Gateway
AI Agent Gateway: Open-source tool keeps credentials out of agent configs

Tuskira’s AI Agent Gateway is an open-source solution that sits between AI agents and everything they call: the MCP tool servers that connect them to services like …

OpenSSH
OpenSSH 10.6 enables a post-quantum signature algorithm, so experimental keys need replacing

The OpenSSH team released version 10.6 on Oct. 6 and said it will ship releases more often for now to get bugfixes into users’ hands more quickly. The maintainers have …

Keyorix
Keyorix: Open-source secrets management for teams that can’t use SaaS

Keyorix is an open-source secrets manager that runs entirely on a company’s own servers. A secrets manager is the locked store where an application fetches the database …

AI
AI agent used Zammad zero-days to breach Dutch vulnerability disclosure non-profit

An agentic AI-powered attack that hit the Dutch Institute for Vulnerability Disclosure (DIVD) on September 21 exploited two zero-day vulnerabilities in Zammad, an open-source …

Jfrog Artifactory
OpenInfra Europe’s JFrog Artifactory instance breached, packages potentially compromised

Attackers have compromised a self-hosted JFrog Artifactory instance operated by OpenInfra Europe, the regional hub of the OpenInfra Foundation warned in a security notice …

OWASP Noir
OWASP Noir: Open-source static analysis tool

OWASP Noir is an open-source static analysis tool that reads an application’s source code and lists the endpoints it exposes: paths, HTTP methods, parameters, headers, …

open-source cybersecurity tools
Hottest cybersecurity open-source tools of the month: September 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 …

Authorizer
Authorizer: Open-source authentication and authorization for your apps

Authorizer is an open-source server for sign-in and access control in web and mobile apps. Teams run it on their own infrastructure and keep user accounts in a database they …

Gnome
GNOME 50.5 security fixes patch a gvfs CVE and Epiphany code injection

GNOME 50.5, which the GNOME Release Team shipped on September 24, patches a CVE in the gvfs file system layer, a JavaScript injection flaw in the Epiphany web browser and a …

Prismor
Prismor: Open-source runtime control plane for AI agents

Prismor is a free, open-source security layer for AI coding agents. It sits between an agent such as Claude Code, Codex, or Cursor and the actions that agent wants to take, …

NetBSD
NetBSD 10.2 security fixes close a remote kernel bug in ipfilter

A NetBSD box at the edge of a network, filtering traffic with ipfilter, has been carrying a kernel flaw that someone outside the machine can set off. The bug is a remotely …

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