OWASP Dependency-Track is an intelligent component analysis platform that helps organizations identify and reduce software supply chain risk. It ingests Software Bill of Materials (SBOM) data, monitors components for known vulnerabilities and policy violations, and integrates with existing security and development toolchains.

DockSec is an AI-powered Docker security scanner from OWASP that explains vulnerabilities in plain English.

oproxy is an open-source local proxy server for inspecting, replaying, and modifying HTTP, HTTPS, and SOCKS5 traffic. Built in Rust with a JavaScript frontend, it supports request breakpoints, traffic rules, Lua scripting, mock responses, DNS overrides, and an AI assistant via any OpenAI-compatible model.

I just completed the Security Engineer learning path on TryHackMe - clocking in at 64 hours of content.

oproxy is an open-source local proxy server for inspecting, replaying, and modifying HTTP, HTTPS, and SOCKS5 traffic. Built in Rust with a JavaScript frontend, it supports request breakpoints, traffic rules, Lua scripting, mock responses, DNS overrides, and an AI assistant via any OpenAI-compatible model.

Caido has released its latest version, 0.57.0. Built entirely in Rust, the tool continues to position itself as a compelling alternative to solutions like Burp Suite and OWASP ZAP.

HumbleBundle has a new bundle up: the Cybersecurity & AI Defense Mega Bundle by Packt - 22 video courses for at least 18,45 € (in the highest tier). Heavy on cert prep (Security+, ISC2, CCNA, AZ-500), plus several courses on AI and security that I hadn’t seen bundled together before.

Proxmox Virtual Environment is an open-source server virtualization platform combining KVM hypervisor, LXC containers, software-defined storage and networking — all managed through a single web interface.

HumbleBundle has released a new AI-focused bundle: the Humble Tech Book Bundle: The Claude Code Mastery Bundle by Zenva featuring (for 22,72€) 8 books in PDF and ePub format published by Zenva.

The new version 2.7.1 of the Nitrokey-app2, the graphical application to manage and use Nitrokey 3 devices, is now officially available.

The 52nd Cologne OWASP Stammtisch takes place on Thursday, May 21, 2026 at REWE Digital, Schanzenstr. 6-20, Kupferwerk 2.20, 1st Floor, Cologne. Doors open at 19:00, talk starts at 19:30.

UPDATE

Another small patch release (v0.56.2) is out, fixing one issue:

OWASP Juice Shop is an intentionally insecure web application used for security training, CTF challenges, and awareness demos — widely regarded as the most modern and comprehensive platform of its kind.

The new version 2.7.0 of the Nitrokey-app2, the graphical application to manage and use Nitrokey 3 devices, is now officially available.

Wazuh is an open-source security platform that delivers combined XDR and SIEM functionality to safeguard endpoints and cloud workloads.

Sniffnet, an application to comfortably monitor your Internet traffic, has a new release.

An updated release of Pynitrokey, the Python client for Nitrokey devices, is now available: version 0.12.0.

Kali Linux has been released in version 2026.1.

HumbleBundle has released another Cybersecurity-related bundle: the Humble Tech Book Bundle: Ethical Hacking and Cyber Defense by Packt featuring (in the highest tier for 16,77€) 21 books in PDF and ePub format published by Packt.

Wazuh is an open-source security solution offering integrated XDR and SIEM capabilities to protect endpoints and cloud-based workloads.

The updated version 2.6.0 of the Nitrokey-app2, the graphical application for managing and using Nitrokey 3 devices, has now been officially released.

Tyler Ramsbey, a professional Pentester, has released his new (paid) course on Foundations of Web App Pentesting including 80+ videos, 30+ custom labs, and 160 hours of lab time.

Wazuh is an open-source security solution offering integrated XDR and SIEM capabilities to protect endpoints and cloud-based workloads.

UPDATE 2

Another bugfix release (v.0.55.3) is now available, which addresses these bugs:

UPDATE #2

Another bugfix release (v2.5.2) has been released.

This bugfix release fixes the PIN input dialogs being disabled.

A new update for Pynitrokey, the Python client for Nitrokey devices, is now available: version 0.11.3.

Wazuh is an open-source security solution offering integrated XDR and SIEM capabilities to protect endpoints and cloud-based workloads.

HumbleBundle has released another Cybersecurity-related book bundle called Humble Tech Book Bundle: Cybersecurity by Wiley including real classic books from Bruce Schneier and Kevin Mitnick.

The latest stable release (012) of Momentum, a custom firmware for the Flipper Zero, is now available.

I’ve finished the Advent of Cyber 2025 at TryHackMe!

Again it was a lot of fun, and I have deepened my knowledge in some subjects.

The graphical application to manage and use Nitrokey 3 devices called Nitrokey-app2, is now available in a new version 2.4.3.

UPDATE

Shortly after, version 0.54.1 has been released.

A small patch release to fix layout issues in scope, match & replace, SDK slots and HTTPQL usage.

ORIGINAL

Kali Linux has been released in version 2025.4.

Yes, it’s this time of year again…

The TryHackMe Recap for 2025 is now live.

If you haven’t noticed already: the yearly hacking challenge over at TryHackMe has begun…

HumbleBundle has released another Cybersecurity-related bundle: the Humble Tech Book Bundle: Hacking 2025 by No Starch featuring (in the highest tier for 33,36 €) 18 books in PDF, ePub and mobi format.

UPDATE

Pynitrokey version 0.11.2 has also been released.

Changelog:

Allow cffi v2 dependency
Allow cryptography v46
PIV: Fix 9C key generation
Update pyscard in lock file
Add support for unauthenticated NetHSM shutdown Handle missing packages when logging package versions and release v0.11.1

UPDATE

UPDATE

Version 0.53.1 has been released shortly after, which addresses some bugs:

Sniffnet, an application to comfortably monitor your Internet traffic, has a new release.

A small update (version 1.8.3) of the Nitrokey 3 firmware has been released.

Tyler Ramsbey, a professional Pentester, has released his new (paid) course on Sliver C2: Pentesting and Evasion including 80 hours of fully hosted lab time.

As you may already know, October is Cybersecurity Awareness Month!

Caido version 0.52.0 is now live. Built entirely in Rust, Caido is quickly establishing itself as a powerful alternative to tools like Burp Suite and OWASP Zap.

Kali Linux has been released in version 2025.3.

The summary of the changelog since the 2025.2 release from June is:

Wazuh, is an open-source security platform that provides unified XDR and SIEM protection for endpoints and cloud workloads.

Sniffnet, an application to comfortably monitor your Internet traffic, has a new release.

Tyler Ramsbey, a professional Pentester, has released his own (paid) Hands-On Hacking Labs platform including the first AD Challenge called BuildingMagic.

UPDATE

An bugfix release v0.51.1 was published.

This release fixes an issue where workflow node dialogs would not properly update.

The final version 1.8.2 of the Nitrokey 3 firmware has been released.

UPDATE

v2.4.1 was released shortly after. Now also binaries for Windows and macOS are available.

Another update to Pynitrokey, the Python client for Nitrokey devices, has been released: version 0.10.0.

Over on the Simply Cyber Academy a new learning course was released: OSINT for Pentesters by Mishaal Khan.

Nitrokey-app2, the graphical application to manage and use Nitrokey 3 devices, is now available in a new version 2.3.5.

UPDATE 01.08.2025

Another patch, v0.50.2 was released.

This patch includes the following bug fix:

HumbleBundle released another Cybersecurity-related bundle: the Humble Tech Book Bundle: Security by APress featuring (in the highest tier for 21,32€) 25 books in ePUB format published by APress.

UPDATE

Meanwhile, two small bugfix releases (0.9.1 and 0.9.2) have also been published.

HumbleBundle have released another cybersecurity related bundle: the Humble Tech Book Bundle: The Pentesting and Hacking Toolkit by Packt.

Tyler Ramsbey, a professional Pentester, has released another learning course on the Simply Cyber Academy: Hands-On Phishing.

Today, the latest stable version 011 of the Flipper Zero custom firmware called Momentum has been released.

Caido, a growing alternative to Burp Suite or OWASP Zap written completly in Rust, has just released their latest version (0.49.0).

Sniffnet, an application to comfortably monitor your Internet traffic, has a new release.

Kali Linux has been released in version 2025.2.

The summary of the changelog since the 2025.1a release from March is:

UPDATE

v0.8.5 was now also released.

This release fixes a bug in nk3 secrets when handling base32 secrets if the length is a multiple of 8.

Steve McMichael from the the Simply Cyber Academy has released an Open Source CSF Profile Assessment Database.

The Simply Cyber Academy has just released another completly free course: Hacking Active Directory by Ryan Yager.

UPDATE

Short after, version 0.48.1 has been released.

Over on the Simply Cyber Academy you can now sign up completly free for the course How to Break into GRC: Mindset, Methods, Skills.

If you own a Flipper Zero, you should already know about the Momentum Firmware. The team behind this custom firmware has now released the latest stable firmware release 010.

Are you currently studiying for some certification? Then the the Humble Tech Book Bundle: Networking and Security Cert Prep by Pearson IT Certification and Exam Cram might be what you’re looking for. It features (in the highest tier for 23,15€) 16 books in PDF format published by Pearson.

A new version 0.8.0 of Pynitrokey, the Python client for Nitrokey devices, has been released.

Kali Linux has been released in version 2025.1a.

The summary of the changelog since the 2024.4 release from December is:

Update: v0.47.1 has been released short after.

This is a patch release to fix an issue where users could not connect to remote Caido instances.

Caido, a growing alternative to Burp Suite or OWASP Zap written completly in Rust, has just released their latest version (0.47.0).

A new version 0.7.4 of Pynitrokey, the Python client for Nitrokey devices, has been released.

Caido, a growing alternative to Burp Suite or OWASP Zap written completly in Rust, has just released their latest version (0.46.0).

I’m making good progress, and have now also completed the Web Fundamentals Learning Path at TryHackMe!

RustScan, the modern and fast port scanner, has just been released in version 2.4.1.

Tyler Ramsbey, a professional Pentester, has released a free learning course on the Simply Cyber Academy: Introduction to Hacking Methodology.

I’ve completed the Cyber Security 101 Learning Path at TryHackMe!

A security update for the firmware of the Nitrokey 3 has been released: version 1.8.1.

HumbleBundle has another offer on an Cybersecurity related book bundle: the Humble Tech Book Bundle: Ultimate Cybersecurity Career by Packt.

The team behind the Momentum Firmware for the Flipper Zero have released the latest stable firmware release 009.

Caido, a growing alternative to Burp Suite or OWASP Zap written completly in Rust, has now released their latest version (0.45.0).

UPDATE

Short after, Pynitrokey 0.7.3 was released to address a problem with older (<= 3.11) Python versions.

The latest version (1.3.2) of Sniffnet adds some more features and improvements:

Do you don’t like reading about cyber security topics?

Then maybe the Humble Audio Book Bundle: Cybersecurity and Forensics by Packt is for you!

I’ve finished the Advent of Cyber 2024 at TryHackMe!

It was a lot of fun, and I’ve learned a lot of new topics.

Kali Linux has been released in version 2024.4.

The summary of the changelog since the 2024.3 release from September is:

The firmware of the Nitrokey 3 has been updated to version 1.8.0. Also a new version 0.7.1 of Pynitrokey has been released.

HumbleBundle has released another Cybersecurity-related bundle: the Humble Tech Book Bundle: Hacking 2024 by No Starch featuring (in the highest tier for 34,57 €) 18 books in PDF, ePub and mobi format.

Pynitrokey, the Python client for Nitrokey devices, has been released in version 0.7.0.

If you -like me- enjoy learning on TryHackMe, then you may already have noticed a new information on your dashboard:

The new version 2.3.3 of the Nitrokey-app2, the graphical application to manage and use Nitrokey 3 devices, is now available.

The yearly hacking challenge over at TryHackMe is about to begin…

The team behind the Momentum Firmware for the Flipper Zero have released the latest firmware release 008.

Caido, a growing alternative to Burp Suite or OWASP Zap, has now released their latest version (0.43.1).

HumbleBundle has released another Cybersecurity-related bundle: the Cybersecurity Month Mega Bundle from O'Reilly featuring (in the highest tier for 22,83€) 22 books in PDF and ePub format published by O’Reilly.

The new version 2.3.2 of the Nitrokey-app2, the graphical application to manage and use Nitrokey 3 devices, is now officially available.

Pynitrokey, the Python client for Nitrokey devices, has been released in version 0.5.0.

Kali Linux has been released in version 2024.3.

The summary of the changelog since the 2024.2 release from June is:

Since the Xtreme Firmware for the Flipper Zero went into the void at the end of July 2024, I was looking for a replacement.

HumbleBundle has released another Cybersecurity-related bundle: the Humble Tech Book Bundle: Threat Intelligence by Packt featuring (in the highest tier for 16,57€) 17 books in PDF and ePub format published by Packt.

Pynitrokey, the Python client for Nitrokey devices, has been released in version 0.4.50.

Only short after the last bundle, yet another book bundle covering certifications has been released by HumbleBundle: the Humble Tech Book Bundle: Sybex CompTIA and more by Wiley.

The latest version (1.3.1) of Sniffnet has some more improvements:

The new version 2.3.1 of the Nitrokey-app2, the graphical application to manage and use Nitrokey 3 devices, is now officially available.

If you are planning to get certified (like me :)), you may find the the Humble Tech Book Bundle: Get Certified! by Packt from HumbleBundle useful.

Pynitrokey, the Python client for Nitrokey devices, has been released in version 0.4.48.

The new firmware version 1.7.2 for the Nitrokey 3 has been released and is now officially available.

Kali Linux has been released in version 2024.2.

The summary of the changelog since the 2024.1 release from February is:

Another Cybersecurity-related bundle by HumbleBundle is now available: the Humble Tech Book Bundle: Cybersecurity by Pearson featuring (in the highest tier for 23,19€) 18 books in PDF format published by Pearson.

The new version 1.7.0 of the Nitrokey 3 firmware and the new version 2.3.0 of the Nitrokey-app2 have been released and are now officially available.

Pynitrokey, the Python client for Nitrokey devices, has been released in version 0.4.47.

The latest version (1.3.0) of Sniffnet has a lot of bugfixes and new features: