Always wanted to try and ethically hack the city of The Hague? Join Hâck The Hague on Monday 5 October 2026! Organised by the Municipality of The Hague.
City Hall, The Hague (NL)
Joined January 2021
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That's a wrap! Hâck The Hague 2026. A big thank you to all the hackers who spent the entire day searching for vulnerabilities in the systems of the municipality of The Hague. Thank you to everyone who helped make this event such a resounding success once again. #HTH26
Today during HTH, ethical hackers are also testing systems of suppliers to the City of The Hague. Why is Orangehill taking part? Founder Sander van den Broek: "We don't see this as a risk, but as an opportunity." Read the interview: hackthehague.com/update/targ… #HackTheHague #HTH26
As a target at Hâck The Hague, Centric opened its systems to ethical hackers.
Nils Hoole, Privacy & Security Officer at Digitale Overheid (Centric): "That fresh perspective helps us discover things we hadn't noticed before."
Full interview: hackthehague.com/update/cent…
#HTH26
On 5 October, 120 ethical hackers will hunt for vulnerabilities in the City of The Hague's digital systems at Hâck The Hague. CISO Lilian Knippenberg: "It's getting quite exciting." Read the interview (in Dutch): hackthehague.com/update/inte… #HTH26 #HackTheHague #cybersecurity
What Oct 5 actually looks like:
🕘 Briefing, rules of engagement, scope opens
🕛 Hacking. Findings assessed on the spot, some patched same day
🕔 Jury verdict, awards, pizza
Bring: your laptop, your setup and a charger.
11 days. #HackTheHague #HTH26
Do you use AI in hacks?
AI is good at: volume, logs, codebases, configs, scripts, hypotheses.
AI is bad at: the gut feeling that something's off, and the stubbornness to chase it.
Best Use of AI award goes to whoever knows the difference.
#HTH26
The full prize lineup for Hâck The Hague 2026 🏆
💥 Most Impactful Hack
🎭 Most Surprising Hack
🎓 Hâckademic Award (students)
🤖 Best Use of AI (new)
📝 Best Report (new)
Two new categories, because the craft is changing.
#HackTheHague #HTH26 #CSW
A city hall full of live systems. One day to crack it. And it's you versus the defense. This is what Hâck The Hague looks like.
7th edition: Monday October 5th. Think you can crack our systems?
youtube.com/watch?v=SZL-G4y_…
🚨 Hâck The Hague is officially FULL! 🚨
We've reached capacity for the 7th edition on October 5th. Registration is now closed.
Already signed up? Keep an eye on your inbox, more details are coming your way soon.
See you on the 5th, hackers 💻🔒
#HTH26 #EthicalHacking #CSW
Students: you'll be at the same table as seasoned pentesters and you might find things they miss.
Hâck The Hague has welcomed student hackers since the start. One day of real-world experience no classroom offers.
Oct 5 🇳🇱 Apply here: ap.lc/iPrjT
#HackTheHague #HTH26
New at #HTH26: Best Report award.
Finding the bug is half the job.
If nobody can reproduce it, the hole stays open.
The least glamorous skill in this field, but the one that changes the most.
Register here: ap.lc/iPrjT
What's in it for you?
🏆 Prizes: including two new ones: Best Use of AI & Best Report
🧠 A real city as your test environment
🤝 120+ hackers, vendors & municipal security in one room
🎽 The hoodie
Oct 5, The Hague City Hall 👇See you there? ap.lc/iPrjT #HTH26
New at #HTH26: Best use of AI award.
Not for the flashiest tool. For the smartest use of one.
Show us how a model helped you find something you'd have missed by hand and explain how. What's your setup? 👇Oct 5, The Hague. Register here: ap.lc/iPrjT #HackTheHague #AI
125 vulnerabilities were found in systems during the last edition of Hâck The Hague. All of them fixed. Some within hours, with the vendor in the room.
What you find here gets patched. That's the difference.
Round 7 is on October 5. Register here: ap.lc/iPrjT #HTH26
🔐 The Hague is opening its systems. Again.
October 5, 2026, the 7th edition of Hâck The Hague. 120+ ethical hackers, real municipal systems, live from City Hall.
Registration is open 👇 ap.lc/iPrjT
#HackTheHague #EthicalHacking #HTH26
🔐 Hackers: The Hague needs you.
On October 5, 2026, 120+ ethical hackers will go head-to-head with the City of The Hague's live systems, right from inside City Hall. Find the vulnerabilities. Protect the city. Make your mark.
Registrations via: [email protected] #HTH26
Helaas is er dit jaar geen Hâck the Hague. Door andere evenementen binnen de gemeente Den Haag was er onvoldoende ruimte om het goed te organiseren. Zodra we nieuws hebben over de volgende editie, horen jullie dat! #HackTheHague #Cybersecurity
The first prize for Hâck The Hague 2024 was awarded to hackers who were able to change something in a web portal. This finding also had a high severity. #HTH24
