CTF Arena
Capture The Flag contests: hack the practice targets, find the hidden flag and submit it for points.
Join solo or with a team.
Solve the challenge on its target.
Paste the flag, earn points, climb the board.
Showing 32 CTFS in this order: featured, live now, upcoming (soonest first), then finished. Ours and other organisers' CTFs are listed together.
EyesOpenCTF 7th edition
EyesOpenCTF 2026 is a FREE CTF competition organized as part of the 7th edition of EOCON.
- Starts
- Ends
- Nov 22, 2026 15:00
- Duration
- 2d
- Where
- Online
- Entry
- Free
- Organiser
- EyesOpen_Security
- Prizes
- 1st: 300 USD + 1 year ExamBoot subscription. (500 USD dedica...
GlacierCTF 2026
We're excited to announce GlacierCTF 2026 for its fifth edition, a 24-hour jeopardy CTF organized by LosFuzzys.
- Starts
- Ends
- Nov 21, 2026 23:00
- Duration
- 1d
- Where
- Online
- Entry
- Free
- Organiser
- LosFuzzys
- Prizes
- TBA
Outback Overflow
Outback Overflow is a free online jeopardy-style CTF built for high schoolers across Australia. Run by the High School Cybersecurity Community, it's designed to be a step...
- Starts
- Ends
- Nov 22, 2026 04:00
- Duration
- 1d
- Where
- Online
- Entry
- Free
- Organiser
- HSCC
- Prizes
- More TBA 1 year .xyz domains pp
Seize da Flaq
Seize Da Flaq is the flagship national-level Capture The Flag (CTF) competition organized by Cyberonites Club, GLA University. The event is designed to challenge and show...
- Starts
- Ends
- Nov 22, 2026 07:30
- Duration
- 20h
- Where
- Mathura, Uttar Pradesh, India, Mathura
- Entry
- Free
- Organiser
- Seize da Flaq
- Prizes
- Overall Pool Prize - 5,00,000 INR Cash Prizes - 30,000 INR...
Crate-CTF 2026
Crate-CTF is an annual Capture The Flag (CTF) competition organised by the Swedish Defence Research Agency in collaboration with the Swedish Armed Forces, designed to int...
- Starts
- Ends
- Nov 22, 2026 02:00
- Duration
- 8h
- Where
- Online
- Entry
- Free
- Organiser
- Crate-CTF
CyberSci Regional Qualifiers 2026-27
CyberSci is Canada's national Cyber Security Challenge for university and college students.
- Starts
- Ends
- Nov 22, 2026 03:00
- Duration
- 7h
- Where
- Onsite at 6 locations in Canada, Onsite at 6 locations in Canada
- Entry
- Free
- Organiser
- CyberSciOrganizers
- Prizes
- Winners at Regionals get instant interviews and sometimes sa...
Pakistan Cybersecurity Challenge (PCC) 2026
National programme of CTF, cryptography and startup competitions run by the National Centre for Cyber Security (NCCS), Air University, Islamabad.
- Starts
- Ends
- Nov 27, 2026 18:00
- Duration
- 3d 9h
- Where
- Islamabad (see official page)
- Entry
- Free
- Organiser
- NCCS, Air University
LakeCTF Quals 26-27
Qualifications for fifth edition of LakeCTF
- Starts
- Ends
- Nov 28, 2026 23:00
- Duration
- 1d
- Where
- Online
- Entry
- Free
- Organiser
- polygl0ts
- Prizes
- Academic bracket Top 10 academic: invited to LakeCTF finals...
L3m0n CTF 2026 (Quals)
L3m0n CTF is the annual flagship capture-the-flag competition of Amrita Vishwa Vidyapeetham, Coimbatore, hosted by TIFAC-CORE in Cyber Security. This is a team-based even...
- Starts
- Ends
- Nov 28, 2026 21:30
- Duration
- 12h
- Where
- Online
- Entry
- Free
- Organiser
- L3m0n CTF
- Prizes
- To be announced
CyberNSK2027-Qualifier
CyberNSK 2027 is one of the largest cybersecurity competitions in Siberia, organized by Siberian Security League in collaboration with Novosibirsk State Technical Univers...
- Starts
- Ends
- Nov 29, 2026 02:00
- Duration
- 12h
- Where
- Online
- Entry
- Free
- Organiser
- siberiansecurityleague
- Prizes
- Top teams from the qualifiers will be invited to the on-site...
BlackHat MEA CTF Final 2026
Black Hat MEA Capture The Flag (CTF) 2026 ?
- Starts
- Ends
- Dec 3, 2026 20:14
- Duration
- 2d
- Where
- Riyadh, Saudi Arabia, Riyadh
- Entry
- Free
- Organiser
- SAFCSP
- Prizes
- Prize Pool Total Prize Pool: SAR 790,000 (Approx. USD 210...
x3CTF 2026
x3CTF is a cute little jeopardy-style CTF with web, pwn, rev, crypto, and misc challs!
- Starts
- Ends
- Dec 6, 2026 23:00
- Duration
- 2d
- Where
- Online
- Entry
- Free
- Organiser
- x3CTF
- Prizes
- TBA but they will be cute
All challenges (17)
Every published challenge on the platform. Open one to read the brief; register to submit flags.