$ ctf42

CPCTF 2026

official repo

CPCTF is a cybersecurity competition for beginners organized by traP. The competition format is Jeopardy and is held online. Pwn, Crypto, Rev, Web, Forensics, Shell, Misc, and PPC are available.

The contest will be held as an individual competition.

CPCTF2026 is sponsored by: ・e-Seikatsu, a company that is changing the real estate industry with IT. ・Fixstars Corporation, a group of performance engineering experts who maximize computer performance. ・pixiv Inc., offering a variety of services to make creative activities more funcentered around the social media platform “pixiv”.

Join our official Discord server here! https://discord.gg/6Sxc9ACvXA

Web 7

Challenge Has
CPCTF_Market files
Hidden_Recipe files
Lets_remove_the_script_tag. files
Physical_CTF files
Template_Playground files
Z files
tar_me files

Pwn 5

Challenge Has
Buffer_Visualizer files
Con files
Killionaire files
Product files
The_first_time_I_saw_the_product_it_was_a_product_that_made_it_into files

Reverse 4

Challenge Has
Hidden files
Omikuji files
Out_of_World files
viGor files

Crypto 7

Challenge Has
1_0_7 files
Anomaly_2 files
Bitwise_Scrumble files
Dualcast files
Very_Exciting files
Yanken_Master files
mod_N_Janken files

Forensics 6

Challenge Has
Authorized_Whale files
Flag_in_Flags files
L0v3_PDF files
Secret_Recipe files
digest files
q files

Misc 5

Challenge Has
CPCTF_jail files
Damaged_Report files
Hello_LaTeX3 files
QRRRRRRRRRR files
ssh2 files

OSINT 3

Challenge Has
IRIS_OUT files
Night_View files
PENGUIN files