CTF Time

Name: CyberSibir2026 (an SibirCTF event.)
Date: June 9, 2026, 3:30 a.m. — 09 June 2026, 12:30 UTC  [add to calendar]
Format: Attack-Defense
On-site
Location: Russia, Tomsk
Offical URL: https://masksafe.ru/cyberv/2026/ctf
Rating weight: 0
Event organizers: keva

Name: LYKNCTF (an LYKN Team event.)
Date: July 6, 2026, midnight — 08 July 2026, 00:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf.itzdenkii.me/
Rating weight: 0
Event organizers: FolodyCTF

Name: No Hack No CTF 2026 (an No Hack No CTF event.)
Date: July 4, 2026, midnight — 06 July 2026, 00:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://nhnc.ic3dt3a.org/
Rating weight: 23.47
Event organizers: ICEDTEA

Name: R3CTF 2026 (an R3CTF event.)
Date: July 4, 2026, 2 a.m. — 06 July 2026, 02:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://ctf2026.r3kapig.com/
Rating weight: 35.95
Event organizers: r3kapig

Name: MindBreak 2026 by ESGI (an MindBreak event.)
Date: July 3, 2026, 9 p.m. — 04 July 2026, 06:00 UTC  [add to calendar]
Format: Jeopardy
On-site
Location: Paris, France
Offical URL: https://linktr.ee/m1ndbr34k
Rating weight: 0.00
Event organizers: ESGI

Name: Fluid Attacks' CTF 2026-2 (an Fluid Attacks CTF event.)
Date: July 4, 2026, 1 p.m. — 05 July 2026, 01:00 UTC  [add to calendar]
Format: Jeopardy
On-line
Offical URL: https://fluidattacks.com/ctf
Rating weight: 0
Event organizers: Fluid Attacks

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: 25.00
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: 25.00
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: 24.69
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