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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
tchentchen
Greetings i18n 2
Web
Hard
12 solves
Submissions (latest 3)
bhcnumas

SOLVED!

Aug 20, 8:19 PM

edwowmath

SOLVED!

Aug 20, 7:40 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🌱
2,144 solves
Upcoming challenges reveal the , , and in advance.
Prev

Aug 2026

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Mon
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27
tchentchen
RFC100008
Web
Easy🌱
135 solves
28
2501
One More Approval
Crypto
Medium
61 solves
29
2501
zen.zip
Misc
Medium
68 solves
30
2501
Anyrunner
Misc
Medium
59 solves
31
tchentchen
Small Image Uploader 2
Web
Medium
61 solves
1
admin
Día Nacional de la Alpaca
Misc
Welcome🌱
206 solves
2
2501
Password, Please
Misc
Easy🌱
168 solves
3-4
arkark
Long Long Flag Printer 2026
Misc
Medium
88 solves
5
pppp4649pppp4649
Happy Birthday
Crypto
Easy🌱
113 solves
6-8
hiikunzhiikunz
AESAESAESAESAESAES
Crypto
Hard
56 solves
9-10
tchentchen
Not so Pyf**k
Misc
Medium
78 solves
 
tchentchen
Not so Pyf**k
Misc
Medium
78 solves
11-12
baumroll1234
Fermat's Last Theorem
Misc
Medium
73 solves
13-15
tchentchen
True or False 2
Misc
Hard
47 solves
16-17
tchentchen
List Sharing
Web
Medium
63 solves
 
tchentchen
List Sharing
Web
Medium
63 solves
18-20
tan90909090tan90909090
wrong instruction
Rev
Hard
50 solves
21-23
tchentchen
Greetings i18n 2
Web
Hard
12 solves
24-26
tchentchen
Planned topicXSS
Web
Hard
27
Coming soon
28
Coming soon
29
Coming soon
30
Coming soon
31
Coming soon
1
Coming soon
2
Coming soon
3
Coming soon
4
Coming soon
5
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6
Coming soon

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Writeups

Writeup for wrong instruction

baumroll1234

ja
wrong instruction

2 hours ago

power

Writeup for Leaked Flag Checker

ja

2026/08/18 11:53

power

Writeup for Password, Please

ja

2026/08/18 03:26

power

Writeup for Read Assembly

ja

2026/08/14 05:59

Writeup for Fermat's Last Theorem

author
ja

2026/08/13 13:59

Rows:

Día Nacional de la Alpaca

Topic: WelcomeReleased: Aug 1, 2026

206 solves
Misc
Welcome🌱1.5

by

admin

USER

SOLVED AT

scott

1 minute ago

2026/08/19 11:56

2026/08/18 14:10

2026/08/18 08:26

2026/08/18 05:31

2026/08/18 05:13

2026/08/17 13:30

2026/08/16 13:43

2026/08/16 09:13

2026/08/16 05:51

2026/08/16 03:06

2026/08/15 22:03

2026/08/15 17:51

2026/08/15 11:45

2026/08/15 11:05

2026/08/15 04:53

2026/08/14 12:30

2026/08/14 11:03

2026/08/14 07:27

2026/08/14 06:23

2026/08/14 03:04

2026/08/14 01:50

2026/08/13 18:15

2026/08/13 14:38

2026/08/13 09:48

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