Project Sekai CTF

Project SEKAI, yet another CTF team.
Recruiting: & Partnership: [email protected]

[Project Sekai CTF @ProjectSEKAIctf]

SekaiCTF 2026 is officially over! Thank you to all participants this year, and congratulations to our winners:

🥇 @TeamH4C__
🥈 @w4llz_Team
🥉 AAAA
🏆 F1ux
🏆 Cow Pig

Once again, thanks everyone for playing!

[sahuang @sahuang97]

Over the past week, I delivered three full-day workshops on behalf of @ProjectSEKAIctf. Each workshop was organized for Pakistan’s national cybersecurity community and combined blockchain security with applied AI.

We began with hands-on Solana security, followed by LLMs and prompt injection in the AI session. We concluded with knowledge-sharing on building AI agents for security audits. Thank you to Trillium and @IgniteNTF for the invitation and the opportunity to share topics closely connected to my work at @osec_io.

[Project Sekai CTF @ProjectSEKAIctf]

We finished 4th at the SCAN CTF 2026 Finals. Big thanks to the organizers for hosting and to all the teams for a great competition. Had a blast competing in Seoul!

#SCAN2026 #SCAN #KBW

[Project Sekai CTF @ProjectSEKAIctf]

This also marks the conclusion of SekaiCTF 2026.

We'd like to thank again to our sponsors, @zellic_io @osec_io @trailofbits @vector35, and @googlecloud for their generous support.

Thanks everyone for playing!🎵

(4/4)

[Project Sekai CTF @ProjectSEKAIctf]

- devilhunter_55: Crypto – apbq-rsa-iv https://t.co/IPYLlY7BIj
- el_s1na: Pwn – ppp https://t.co/4hhgC8vABw
- @hxuu0: Web – <\w+ https://t.co/zkG0TZUXfU
- mushsh: Web – EnD https://t.co/cbjWytoDQ9

(2/4)

[Project Sekai CTF @ProjectSEKAIctf]

[+] Minions in 16k Winners:
1. m_afj: https://t.co/FZXXBv2Hxc, https://t.co/JXYjD7myiO
2. ilovecandy69: https://t.co/U1CEkjFw0L
2. lowrule: https://t.co/a028Hr5I40

[+] Binary Ninja Personal License:
- xtea418: Misc - ▶ Sanity Check https://t.co/hhr6uJOHgf

(3/4)

[Project Sekai CTF @ProjectSEKAIctf]

🧵We would like to announce the writeup competition winners:

[+] Cash Prize Winners:
- .sestoelemento: Blockchain – Open World https://t.co/toaggmuldf
- kiinzu: Blockchain – PP Farming (1 & 2) https://t.co/KZX55oss0l

(1/4)

[Robert Chen @NotDeGhost]

We're launching a $100,000 fund to save CTFs.

[r3kapig @r3kapig]

R3CTF 2026 has come to a successful close. Please join us in congratulating this year’s award-winning teams!

🥇 BBBB
🥈 EQST
🥉 @ProjectSEKAIctf

Thank you to our sponsors @nebusecurity @osec_io @zellic_io @vector35 @googlecloud

Hope see you next year!

[Project Sekai CTF @ProjectSEKAIctf]

Thanks to @AnthropicAI for keeping the promise!

[Project Sekai CTF @ProjectSEKAIctf]

Did this work? CTF saving humanity

[Project Sekai CTF @ProjectSEKAIctf]

Running a CTF for thousands of players without things falling over is no small feat. @es3n1n wrote up exactly how we did it: https://t.co/pCIXCMI0RV

[Project Sekai CTF @ProjectSEKAIctf]

SekaiCTF 2026 is officially over! Thank you to all participants this year, and congratulations to our winners:

🥇 @TeamH4C__
🥈 @w4llz_Team
🥉 AAAA
🏆 F1ux
🏆 Cow Pig

Once again, thanks everyone for playing!

[Qyn @qynln]

For this (maybe last) year of SekaiCTF I made a fullchain challenge, chaining together an 0-day in ladybird/libjs, an 0-day qemu TCG LPE and a n-day qemu escape:

https://t.co/w8KbB5EUMg

We also re-released another challenge with a running bounty until next week!

[Project Sekai CTF @ProjectSEKAIctf]

24 hours into #SekaiCTF 2026. A few challenges remain unsolved, come and pwn them at https://t.co/mNH5Lvyv6E :)

[Project Sekai CTF @ProjectSEKAIctf]

SekaiCTF 2026 has officially started! You can still register now at https://t.co/GzovO60S6Y.

[Project Sekai CTF @ProjectSEKAIctf]

Finally, thanks to @XCTF_League for the partnership!

As a reminder, the winning team of SekaiCTF 2026 will earn a spot in the 11th XCTF Finals.

[Project Sekai CTF @ProjectSEKAIctf]

Big thanks to all of our generous sponsors for #SekaiCTF 2026!

All sponsors will be showcased in the following thread, in no particular order.🧵

[Project Sekai CTF @ProjectSEKAIctf]

Big thanks to @googlecloud for the infrastructure support! Learn more about Google Cloud Platform at https://t.co/1Fgkpth6W4