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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
25 solves
Submissions (latest 3)
prof

SOLVED!

Sep 22, 3:03 PM

Leaderboard

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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🌱
2,214 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🌱
126 solves
2
hiikunzhiikunz
base 16-32-64
Misc
Easy🌱
102 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
70 solves
16-18
edwowmathedwowmath
neighboRhood_diStAnce
Crypto
Hard
41 solves
19-21
hiikunzhiikunz
nested eval
Misc
Hard
43 solves
 
hiikunzhiikunz
nested eval
Misc
Hard
43 solves
22-24
2501
The 3rd
Crypto
Hard
25 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
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4
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Writeups

Writeup for nested eval

baumroll1234

ja
nested eval

18 hours ago

Rows:

PPPPParse

Topic: JavaScriptReleased: Mar 18, 2026

106 solves
Misc
Medium3.5

by

ark

ark

USER

SOLVED AT

bigmc1971

2026/08/23 13:05

2026/08/11 02:38

2026/07/03 08:33

2026/06/30 11:18

2026/06/29 08:20

2026/05/04 15:38

2026/04/25 09:00

2026/04/16 15:30

2026/04/01 02:32

2026/03/29 17:58

2026/03/28 17:48

2026/03/27 14:45

2026/03/26 15:29

2026/03/26 00:04

2026/03/25 09:10

2026/03/25 06:34

2026/03/24 11:26

2026/03/22 17:13

2026/03/21 10:46

2026/03/21 02:32

2026/03/20 14:34

2026/03/20 11:18

2026/03/20 09:28

2026/03/20 06:29

2026/03/19 14:49

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