CTF Time

Name: Sieberrsec CTF 7.0 (an Sieberrsec CTF event.)
Date: June 17, 2026, 1 a.m. — 17 June 2026, 13:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://sieberr.live/
Rating weight: 0
Event organizers: sieberr.live

Name: boroCTF 2026 (an boroCTF event.)
Date: June 12, 2026, 8 p.m. — 16 June 2026, 03:59 UTC  [add to calendar]
Format: Jeopardy
On-line
Location: New Jersey
Offical URL: https://boroctf.com/
Rating weight: 0
Event organizers: KyteBytes

Name: Anti-Slop CTF 2026 (an Anti-Slop CTF event.)
Date: June 13, 2026, 1 a.m. — 15 June 2026, 01:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.antislopp.i.ng/
Rating weight: 0
Event organizers: hackme

Name: CyberSci Nationals 2025-2026 (an CyberSci event.)
Date: June 13, 2026, 1 p.m. — 14 June 2026, 23:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Ottawa, Canada
Offical URL: https://cybersecuritychallenge.ca/
Rating weight: 0.00
Event organizers: CyberSciOrganizers

Name: Operation Heist CTF 2026 (an HACK KAP CTF event.)
Date: June 13, 2026, 2 p.m. — 14 June 2026, 14:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://registration.hackkap.com/
Rating weight: 0
Event organizers: HACK KAP

Name: SCTF 2026 (an SCTF-XCTF event.)
Date: June 14, 2026, 1 a.m. — 15 June 2026, 01:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Location: On-line
Offical URL: https://sctf2026.xctf.org.cn/
Rating weight: 0
Event organizers: Syclover

Name: RPCA CTF 2026 (an RPCA CTF event.)
Date: June 5, 2026, 5 p.m. — 08 June 2026, 17:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Nakhon Pathom, Thailand
Offical URL: https://grandctf.rpca.ac.th/
Rating weight: 0
Event organizers: RPCA Cyber Club

Name: SAS CTF 2026 Quals (an SAS CTF event.)
Date: June 6, 2026, noon — 07 June 2026, 12:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.thesascon.com/
Rating weight: 31.00
Event organizers: Drovosec SAS CREW

Name: DalCTF 2026 (an DalCTF event.)
Date: June 6, 2026, 1 p.m. — 07 June 2026, 15:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Location: Halifax, Canada and Online
Offical URL: https://dalctf2026.com/
Rating weight: 24.89
Event organizers: HTTP Status 418

Name: GPN CTF 2026 (an GPN CTF event.)
Date: June 5, 2026, 10 a.m. — 06 June 2026, 22:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://gpn24.ctf.kitctf.de/
Rating weight: 69.00
Event organizers: KITCTF

Name: ZeroDay Heist 2026 (an ZerodayHeist event.)
Date: June 6, 2026, 6:30 a.m. — 06 June 2026, 12:30 UTC  [add to calendar]
Format: Jeopardy
On-line
Location: On-line
Offical URL: https://ctf.cyberhx.com/
Rating weight: 24.33
Event organizers: CyberXoX

Name: HASBLCTF26 (an HASBLCTF event.)
Date: May 29, 2026, 5 p.m. — 31 May 2026, 17:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://www.hasblctf.tech/
Rating weight: 25.00
Event organizers: ExploitsFromHeaven1337

Name: Hardwear.io USA 2026 Hardware CTF (an Hardware CTF event.)
Date: May 29, 2026, 5 p.m. — 30 May 2026, 20:50 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: US, Santa Clara
Offical URL: https://hwc.tf/
Rating weight: 0.00
Event organizers: Hardware CTF by Quarkslab

Name: BYUCTF 2026 (an BYUCTF event.)
Date: May 30, 2026, midnight — 31 May 2026, 00:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctfd.cyberjousting.com/
Rating weight: 53.29
Event organizers: BYU Cyberia

Name: Grey Cat The Flag 2026 Qualifiers (an Grey Cat The Flag event.)
Date: May 30, 2026, 2 a.m. — 31 May 2026, 02:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Location: Singapore
Offical URL: https://ctf.nusgreyhats.org/
Rating weight: 47.50
Event organizers: NUSGreyhats

Name: WhiteHats TrojanCTF 2026 (an TrojanCTF event.)
Date: May 30, 2026, 9 a.m. — 30 May 2026, 19:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Netherlands, Eindhoven
Offical URL: https://eshatrojan.nl/trojanctf
Rating weight: 0.00
Event organizers: E.S.H.A. Trojan

Name: bhackari CTF 2026 (an bhackari CTF event.)
Date: May 30, 2026, 10 a.m. — 31 May 2026, 10:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.bhackari.it/
Rating weight: 24.75
Event organizers: bhackari

Name: Hackअस्त्र (an Hackअस्त्र CTF Qualifiers event.)
Date: May 29, 2026, 10:15 a.m. — 30 May 2026, 17:15 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.hackastra.tech/
Rating weight: 25.00
Event organizers: Ethical HCK

Name: HSE CTF 2026 (an HSE CTF event.)
Date: May 30, 2026, 7 a.m. — 30 May 2026, 13:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Moscow, Russia
Offical URL: https://ctf.miem.hse.ru/
Rating weight: 0.00
Event organizers: HSE CTF Crew

Name: Pwn2Play Open CTF (an Pwn2Play Open CTF event.)
Date: May 30, 2026, 9 a.m. — 30 May 2026, 18:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Location: DMU Leicester & Online
Offical URL: https://pwn2play.biterra.co/
Rating weight: 0
Event organizers: DMUHackers26