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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
37 solves
Submissions (latest 3)
kuroiko

SOLVED!

Aug 23, 9:09 AM

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🌱
2,147 solves
Upcoming challenges reveal the , , and in advance.
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Aug 2026

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27
tchentchen
RFC100008
Web
Easy🌱
140 solves
28
2501
One More Approval
Crypto
Medium
61 solves
29
2501
zen.zip
Misc
Medium
68 solves
30
2501
Anyrunner
Misc
Medium
60 solves
31
tchentchen
Small Image Uploader 2
Web
Medium
61 solves
1
admin
Día Nacional de la Alpaca
Misc
Welcome🌱
214 solves
2
2501
Password, Please
Misc
Easy🌱
177 solves
3-4
arkark
Long Long Flag Printer 2026
Misc
Medium
90 solves
5
pppp4649pppp4649
Happy Birthday
Crypto
Easy🌱
119 solves
6-8
hiikunzhiikunz
AESAESAESAESAESAES
Crypto
Hard
58 solves
9-10
tchentchen
Not so Pyf**k
Misc
Medium
80 solves
 
tchentchen
Not so Pyf**k
Misc
Medium
80 solves
11-12
baumroll1234
Fermat's Last Theorem
Misc
Medium
76 solves
13-15
tchentchen
True or False 2
Misc
Hard
48 solves
16-17
tchentchen
List Sharing
Web
Medium
69 solves
 
tchentchen
List Sharing
Web
Medium
69 solves
18-20
tan90909090tan90909090
wrong instruction
Rev
Hard
55 solves
21-23
tchentchen
Greetings i18n 2
Web
Hard
37 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
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3
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4
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6
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Writeups

Writeup for wrong instruction

umineko

ja
wrong instruction

2026/08/22 05:08

power

Writeup for Leaked Flag Checker

ja

2026/08/18 11:53

power

Writeup for Password, Please

ja

2026/08/18 03:26

Rows:

Password, Please

Topic: BashReleased: Aug 2, 2026

177 solves
Misc
Easy🌱2.5

by

2501

I wrote my first password checker in Bash. Please log in.

Beginner Hint

In Bash, what does == do inside [[ ... ]] when its right-hand side is not quoted?

password-please.tar.gz

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