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Daily AlpacaHack

A CTF challenge series with fun puzzles to enjoy every day

What is Daily AlpacaHack?

We regularly publish simple, beginner-friendly or educational CTF challenges!

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Solve each challenge within its time window to appear on the leaderboard.

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Today's Challenge
hiikunzhiikunz
nested eval
Misc
Hard
28 solves
Submissions (latest 3)
kapumoka

SOLVED!

Sep 19, 8:24 PM

hiikunz

SOLVED!

Sep 19, 3:03 PM

Leaderboard

Try the first challenge

Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.

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admin
AlpacaHack 2100
Misc
Welcome🌱
2,210 solves
Upcoming challenges reveal the , , and in advance.
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Sep 2026

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tchentchen
Springing
Web
Medium
74 solves
1
admin
QUIZ ALPACASHOCK
Misc
Welcome🌱
122 solves
2
hiikunzhiikunz
base 16-32-64
Misc
Easy🌱
99 solves
3-4
tan90909090tan90909090
Let's Shut Down Linux
Misc
Medium
62 solves
5
baumroll1234
6-8
minaminaominaminao
Bitflip RSA
Crypto
Hard
53 solves
 
minaminaominaminao
Bitflip RSA
Crypto
Hard
53 solves
9-11
minaminaominaminao
\^o^/
Misc
Hard
42 solves
12-13
tan90909090tan90909090
sin function vs. fsin instruction
Rev
Misc
Medium
54 solves
14-15
tan90909090tan90909090
integer division
Misc
Medium
67 solves
16-18
edwowmathedwowmath
neighboRhood_diStAnce
Crypto
Hard
37 solves
19-21
hiikunzhiikunz
nested eval
Misc
Hard
28 solves
 
hiikunzhiikunz
nested eval
Misc
Hard
28 solves
22
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Writeups

Writeup for neighboRhood_diStAnce

baumroll1234

ja
neighboRhood_diStAnce

23 hours ago

curetwinkle

Writeup for simple ROP(アセンブリ解説多め)

ja

2026/09/15 03:55

gattoartz

Writeup for Integer Writer

ja

2026/09/14 12:03

sp1n0z4

Writeup for Bitflip RSA

en

2026/09/12 23:42

gattoartz

Writeup for Leaked Flag Checker

Rows:

curl as a service 2

Topic: curlReleased: May 17, 2026

111 solves
WebMisc
Hard5.5

by

tan90909090

tan90909090

Writeups

Writeup for Daily AlpacaHack 5/11-5/17

labpump

ja

2026/05/19 12:12


nitcelcius

Writeup for curl as a service 2

ja

2026/05/18 12:54


コメントを入力 Daily AlpacaHackに挑戦するつくよみちゃん 05/17 web-misc/curl as a service 2/tan90909090

ja

2026/05/17 17:13



kakur41

Writeup for Daily AlpacaHack 5/17-5/23

ja

2026/06/28 05:14



tadanobutubutu

Writeup for curl as a service 2

ja

2026/05/17 15:45

descriptionsolveswriteups