4–6 Sep3 daysunder 100
Weekend gathering on Rügen, the northernmost stop on the German Chaos circuit.
official · partialcfp unknown
Three days at La Grange near Bergen auf Rügen, on the Baltic island. Small, self-organised and closer to a retreat than a conference: talks and workshops arranged by whoever turns up, with the island itself as much of the draw as the programme.
10–11 Sep2 days100–500
Stockholm's single-track technical conference, plus a free community day the day before.
verifiedcfp closed
A non-profit, English-language, single-track IT security conference at Münchenbryggeriet in Stockholm, deliberately free of vendor pitches. Two conference days on 10–11 September preceded by a half-day Community Event on 9 September that anyone can attend without a ticket. Speakers get a 20,000 SEK honorarium, which is unusual in Europe and shows in the research quality.
- Free half-day Community Event on 9 September, open without a ticket
- Single track, 30- or 45-minute talks, previously unpresented research preferred
- Speaker honorarium of 20,000 SEK plus travel and accommodation
11–13 Sep3 days100–500
MetaRheinMainChaosDays, running annually since 2004, motto "Grenzen überwinden".
verifiedcfp closedsold out
Three days at the Piloty building of TU Darmstadt, organised by the MRMCD association with local hackerspaces, CCC groups and nearby universities. A conference rather than a camp — a curated talk programme with workshops around it, and one of the longest-running German community security events. Attendance tickets are already sold out; the call for talks is still open.
- Twenty-second consecutive edition
- Call for participation closed 1 August 2026
- Attendance tickets sold out
18–20 Sep3 days100–500
Twenty-second edition in Dresden, motto "aufbrechen", free entry.
verifiedcfp 2dfree
The annual hacker gathering of CCC Dresden, at the Zentralwerk in the north of the city. Three talk rooms plus workshop space, with a programme that runs from surveillance and decentralised infrastructure to sustainability and a Junghacker track for children. Admission is free and talks are streamed and recorded.
- Three talk rooms plus dedicated workshop space
- Junghackertrack with soldering, programming and modelling for children
- Call for artists runs alongside the talk call — installations, light, music
23–24 Sep2 days100–500
The German chapter's national application-security conference, in Karlsruhe.
official · partialcfp unknown
Two days of application security run by the German chapter of OWASP, the national counterpart to Global AppSec. Programme is practitioner-facing — secure development, DevSecOps and the OWASP projects themselves — and it is the main German-language AppSec fixture of the year.
23–24 Sep2 days100–500
Portugal's OWASP chapter conference, two days of keynotes, workshops and a CTF.
official · partialcfp unknown
The Portuguese OWASP chapter's national application-security conference, aimed at security professionals, developers and architects. Two days combining keynotes, hands-on workshops and a capture-the-flag, with the organisers expecting 400-plus attendees. Sits five weeks before BSides Lisbon, so the two are a plausible pair for one trip.
24–25 Sep2 days100–500
Belgium's hacker conference, in Mechelen rather than Ghent since the venue move.
verifiedcfp closed
Two conference days at Lamot in Mechelen, preceded by three days of deep-technical training at the Novotel. Alongside the talks there are workshops, an IoT/ICS village, a hardware-hacking space run by Ko-Lab, an online CTF and a 10km hacker run. Ten minutes' walk from Mechelen station and twenty minutes from Brussels Airport.
- Three days of training on 21–23 September at the Novotel before the conference
- IoT/ICS village, hardware-hacking space and a retro-gaming room
- Online CTF running from day one, and a 10km hacker run on day two
24 Sepunder 100
First local OWASP conference held in Paris.
official · partialcfp unknown
A single-day application-security conference in Paris, the first local OWASP event France has run. The programme is drawn from European speakers and the organisers expect over 150 security professionals. Worth noting for anyone tracking the French scene, which is otherwise almost invisible to English-language search.
25–26 Sep2 daysunder 100
Weekend camp run by hacksaar at the HTW Saar campus.
official · partialcfp unknown
A two-day community knowledge camp organised by the Saarbrücken hackerspace hacksaar at the HTW Saar. Barcamp-shaped rather than a curated conference: sessions are proposed on the day and skew towards hardware, tooling and the practical end of security.
25–27 Sep3 daysunder 100
Three days in a former boiler house in Nuremberg, run by the 0x90 space.
official · partialcfp unknown
A small Chaos-adjacent gathering at the Heizhaus in Nuremberg, organised by the 0x90 hackerspace. Talks, workshops and a lot of unstructured time; closer in spirit to a camp than a conference despite being indoors. Overlaps with Mega-Knowledgecamp on the same weekend.