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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
2501
The 3rd
Crypto
Hard
12 solves
Submissions (latest 3)
gin

SOLVED!

Sep 21, 11:06 PM

edwowmath

SOLVED!

Sep 21, 10:27 PM

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🌱
2,213 solves
Upcoming challenges reveal the , , and in advance.
Prev

Sep 2026

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tchentchen
Springing
Web
Medium
74 solves
1
admin
QUIZ ALPACASHOCK
Misc
Welcome🌱
125 solves
2
hiikunzhiikunz
base 16-32-64
Misc
Easy🌱
101 solves
3-4
tan90909090tan90909090
Let's Shut Down Linux
Misc
Medium
63 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
43 solves
12-13
tan90909090tan90909090
sin function vs. fsin instruction
Rev
Misc
Medium
55 solves
14-15
tan90909090tan90909090
integer division
Misc
Medium
69 solves
16-18
edwowmathedwowmath
neighboRhood_diStAnce
Crypto
Hard
41 solves
19-21
hiikunzhiikunz
nested eval
Misc
Hard
39 solves
 
hiikunzhiikunz
nested eval
Misc
Hard
39 solves
22-24
2501
The 3rd
Crypto
Hard
12 solves
25
Coming soon
26
Coming soon
27
Coming soon
28
Coming soon
29
Coming soon
30
Coming soon
1
Coming soon
2
Coming soon
3
Coming soon
4
Coming soon

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Writeups

Writeup for nested eval

baumroll1234

ja
nested eval

2 hours ago

Rows:

secret-table-3

Topic: SQLReleased: Jul 10, 2026

104 solves
Web
Medium5.5

by

hiikunz

hiikunz

USER

SOLVED AT

anapy

2026/09/16 09:01

2026/09/15 21:11

2026/09/15 10:37

2026/09/11 15:25

2026/09/10 08:32

2026/09/08 17:45

2026/09/02 13:07

2026/08/29 13:15

2026/08/27 11:18

2026/08/26 09:02

2026/08/21 05:53

2026/08/18 02:47

2026/08/17 07:42

2026/08/17 07:33

2026/08/09 11:50

2026/08/02 10:56

2026/07/31 11:23

2026/07/31 07:00

2026/07/26 11:13

2026/07/26 06:48

2026/07/22 14:57

2026/07/21 17:22

2026/07/16 07:44

2026/07/16 06:58

2026/07/15 14:03

Rows:

descriptionsolveswriteups