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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
Springing
Web
Medium
48 solves
Submissions (latest 3)
despair09

SOLVED!

Aug 30, 2:40 PM

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🌱
2,169 solves
Upcoming challenges reveal the , , and in advance.
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Aug 2026

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27
tchentchen
RFC100008
Web
Easy🌱
145 solves
28
2501
One More Approval
Crypto
Medium
61 solves
29
2501
zen.zip
Misc
Medium
69 solves
30
2501
Anyrunner
Misc
Medium
66 solves
31
tchentchen
Small Image Uploader 2
Web
Medium
63 solves
1
admin
Día Nacional de la Alpaca
Misc
Welcome🌱
238 solves
2
2501
Password, Please
Misc
Easy🌱
204 solves
3-4
arkark
Long Long Flag Printer 2026
Misc
Medium
95 solves
5
pppp4649pppp4649
Happy Birthday
Crypto
Easy🌱
136 solves
6-8
hiikunzhiikunz
AESAESAESAESAESAES
Crypto
Hard
60 solves
9-10
tchentchen
Not so Pyf**k
Misc
Medium
85 solves
 
tchentchen
Not so Pyf**k
Misc
Medium
85 solves
11-12
baumroll1234
Fermat's Last Theorem
Misc
Medium
82 solves
13-15
tchentchen
True or False 2
Misc
Hard
53 solves
16-17
tchentchen
List Sharing
Web
Medium
77 solves
 
tchentchen
List Sharing
Web
Medium
77 solves
18-20
tan90909090tan90909090
wrong instruction
Rev
Hard
59 solves
21-23
tchentchen
Greetings i18n 2
Web
Hard
52 solves
24-26
tchentchen
Xwitter
Web
Hard
40 solves
27-28
tan90909090tan90909090
Let's analyze system calls
Rev
Medium
44 solves
29-31
tchentchen
Springing
Web
Medium
48 solves
 
tchentchen
Springing
Web
Medium
48 solves
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

tchen

Writeup for Xwitter

tchen

author
en
Xwitter

2026/08/29 05:39

alpha0314sub

Writeup for Flag is A+B

ja

2026/08/29 01:57

power

Writeup for Encoding Basics

ja

2026/08/26 12:20

power

Writeup for Bars

ja

2026/08/26 08:34

Rows:

You've Got Shlex

Topic: JailReleased: Jul 14, 2026

89 solves
Misc
Medium5.0

by

tchen

tchen

USER

SOLVED AT

bpaul

2026/07/28 09:11

2026/07/27 01:10

2026/07/22 01:08

2026/07/21 12:19

2026/07/20 20:39

2026/07/20 16:22

2026/07/19 05:54

2026/07/18 12:15

2026/07/17 12:33

2026/07/17 03:02

2026/07/16 09:49

2026/07/15 20:21

2026/07/15 15:57

2026/07/15 08:42

2026/07/15 04:06

2026/07/14 15:04

2026/07/14 14:59

2026/07/14 14:46

2026/07/14 14:14

2026/07/14 14:08

2026/07/14 13:45

2026/07/14 13:26

2026/07/14 13:19

2026/07/14 13:15

2026/07/14 13:05

Rows:

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