CTF Time

Name: SekaiCTF 2026 (an SekaiCTF event.)
Date: June 27, 2026, 8 a.m. — 29 June 2026, 08:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.sekai.team/
Rating weight: 79.25
Event organizers: Project Sekai

Name: V1T CTF 2026 (an V1t CTF event.)
Date: June 27, 2026, 2 a.m. — 28 June 2026, 14:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.v1t.site/
Rating weight: 22.14
Event organizers: R4wr

Name: MntcrlCTF 2026 (an MNTCRL CTF event.)
Date: June 27, 2026, 4 p.m. — 28 June 2026, 16:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.mntcrl.it/
Rating weight: 0
Event organizers: M0NT3C4RL0

Name: Grey Cat The Flag 2026 Finals (an Grey Cat The Flag event.)
Date: June 27, 2026, 2 a.m. — 28 June 2026, 02:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Singapore
Offical URL: https://ctf.nusgreyhats.org/
Rating weight: 0.00
Event organizers: NUSGreyhats

Name: TraceBash CTF 2026 (an TraceBash CTF event.)
Date: June 26, 2026, 9:30 a.m. — 27 June 2026, 09:30 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.tracebash.xyz/
Rating weight: 0
Event organizers: TraceBash

Name: BCACTF 7.0 [postponed] (an BCACTF event.)
Date: June 19, 2026, 10 a.m. — 22 June 2026, 10:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://www.bcactf.com/
Rating weight: 65.05
Event organizers: Bing Chilling Academies

Name: RIFFHACK: Black Market Break-In (an Biterra CTFs event.)
Date: June 19, 2026, noon — 22 June 2026, 00:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: http://riffhack.biterra.co/
Rating weight: 0
Event organizers: Biterra

Name: Google Capture The Flag 2026 (an Google Capture The Flag event.)
Date: June 19, 2026, 6 p.m. — 21 June 2026, 18:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://g.co/ctf
Rating weight: 88.82
Event organizers: Google CTF

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: 24.97
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: 25.00
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: 24.67
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: 29.12
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