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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
haihuiliyuyuan
typhoon-pythoon
Rev
Medium
34 solves
Submissions (latest 3)
harada166

SOLVED!

Sep 26, 12:39 AM

Leaderboard

Try the first challenge

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

View challenge
admin
AlpacaHack 2100
Misc
Welcome🌱
2,221 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🌱
135 solves
2
hiikunzhiikunz
base 16-32-64
Misc
Easy🌱
108 solves
3-4
tan90909090tan90909090
Let's Shut Down Linux
Misc
Medium
64 solves
5
baumroll1234
6-8
minaminaominaminao
Bitflip RSA
Crypto
Hard
56 solves
 
minaminaominaminao
Bitflip RSA
Crypto
Hard
56 solves
9-11
minaminaominaminao
\^o^/
Misc
Hard
44 solves
12-13
tan90909090tan90909090
sin function vs. fsin instruction
Rev
Misc
Medium
55 solves
14-15
tan90909090tan90909090
integer division
Misc
Medium
71 solves
16-18
edwowmathedwowmath
neighboRhood_diStAnce
Crypto
Hard
42 solves
19-21
hiikunzhiikunz
nested eval
Misc
Hard
50 solves
 
hiikunzhiikunz
nested eval
Misc
Hard
50 solves
22-24
2501
The 3rd
Crypto
Hard
36 solves
25-26
haihuiliyuyuan
typhoon-pythoon
Rev
Medium
34 solves
27
Coming soon
28
Coming soon
29
Coming soon
30
Coming soon
1
Coming soon
2
Coming soon
3
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4
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Writeups

Writeup for The 3rd

baumroll1234

ja
The 3rd

2026/09/24 21:08

Rows:

Style Your Alpaca

Topic: Client-SideReleased: Jun 27, 2026

62 solves
Web
Hard7.0

by

bubu

bubu

USER

SOLVED AT

ryuun1corn

2026/08/29 03:28

2026/08/01 11:48

2026/07/17 17:14

2026/07/13 06:52

2026/07/05 13:36

2026/07/03 12:35

2026/07/02 08:44

2026/06/30 03:16

2026/06/28 10:40

2026/06/27 15:23

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2026/06/27 13:59

2026/06/27 12:52

2026/06/27 12:36

2026/06/27 10:18

2026/06/27 08:51

2026/06/27 08:34

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2026/06/27 06:51

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