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!

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 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.

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

- devilhunter_55: Crypto – apbq-rsa-iv drive.google.com/drive/folders/…
- el_s1na: Pwn – ppp epsilons1na.github.io/posts/sekai_ct…
- @hxuu0: Web – <\w+ vhxuu.xyz/blog/sekai26/l…
- mushsh: Web – EnD mushroom.cat/ctf/http-desyn…

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[+] Minions in 16k Winners:
1. m_afj: mrfuzzypants.writeups-me.workers.dev/challenge?titl…, mrfuzzypants.writeups-me.workers.dev/challenge?titl…
2. ilovecandy69: joksdz.github.io/website/#/blog…
2. lowrule: files.catbox.moe/9mn9ax.pdf

[+] Binary Ninja Personal License:
- xtea418: Misc - ▶ Sanity Check sandbox.rip/sekai-sanity-c…

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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!🎵

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🧵We would like to announce the writeup competition winners:

[+] Cash Prize Winners:
- .sestoelemento: Blockchain – Open World pnasis.gitlab.io/posts/sekaictf…
- kiinzu: Blockchain – PP Farming (1 & 2) kiinzu.io/blog/sekaictf-…

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

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!

Thanks to @AnthropicAI for keeping the promise!

Running a CTF for thousands of players without things falling over is no small feat. @es3n1n wrote up exactly how we did it: sekai.team/blog/sekaictf-…

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:

qyn.app/blog/sekaictf-…

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

24 hours into #SekaiCTF 2026. A few challenges remain unsolved, come and pwn them at ctf.sekai.team :)

SekaiCTF 2026 has officially started! You can still register now at ctf.sekai.team.

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

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

Big thanks to @googlecloud for the infrastructure support! Learn more about Google Cloud Platform at cloud.google.com

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.