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Daily AlpacaHack

A daily CTF challenge with a fun new puzzle every day

What is Daily AlpacaHack?

We publish one simple, beginner-friendly or educational CTF challenge every day!

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Solve within 24 hours of release to appear on the leaderboard.

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Today's Challenge
k0080k0080
what-is-my-pointer
Pwn
Hard
11 solves
Submissions (latest 3)
toomer

SOLVED!

Jul 24, 5:43 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🌱
2,013 solves
Upcoming challenges reveal the , , and in advance.
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Jul 2026

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Mon
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Fri
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29
tchentchen
Nano Services
Web
Medium
88 solves
30
minaminaominaminao
Super Short System Exit
Misc
Medium
83 solves
1
admin
Alpaca Nation
Misc
Welcome🌱
245 solves
2
hiikunzhiikunz
Flag is A+B
Crypto
Easy🌱
145 solves
3
tchentchen
Lucky Redirect
Web
Easy🌱
140 solves
4
hiikunzhiikunz
Renda
Rev
Medium
110 solves
5
tchentchen
IP Blocked Secret
Web
Hard
66 solves
6
minaminaominaminao
duplicate entry
Misc
Easy🌱
141 solves
7
hiikunzhiikunz
Lazy RSA
Crypto
Medium
104 solves
8
minaminaominaminao
Let's Poly1305!
Crypto
Medium
76 solves
9
shiragishiragi
private method
Misc
Easy🌱
136 solves
10
hiikunzhiikunz
secret-table-3
Web
Medium
84 solves
11
baumroll1234
A slight mistake
Pwn
Hard
69 solves
12
tan90909090tan90909090
13
baumroll1234
Redirecting to Login Page
Web
Easy🌱
147 solves
14
tchentchen
You've Got Shlex
Misc
Medium
87 solves
15
minaminaominaminao
Let's Poly1305! 2
Crypto
Hard
64 solves
16
tchentchen
Beat the Alpaca Lord
Web
Medium
90 solves
17
pppp4649pppp4649
biribiri
Crypto
Medium
86 solves
18
tchentchen
Greetings CGI
Web
Hard
70 solves
19
hiikunzhiikunz
no win func
Pwn
Hard
72 solves
20
tchentchen
Alpaca Blog
Web
Easy🌱
113 solves
21
tan90909090tan90909090
NOP Variant
Rev
Misc
Medium
65 solves
22
arkark
jinjail
Misc
Hard
42 solves
23
tchentchen
True or False
Misc
Medium
66 solves
24
minaminaominaminao
Cache Me If You Can 2
Web
Hard
42 solves
25
k0080k0080
what-is-my-pointer
Pwn
Hard
11 solves
26
tchentchen
Planned topicPython
Web
Hard
27
Planned topicHTTP
Web
Easy🌱
28
Coming soon
29
Coming soon
30
Coming soon
31
Coming soon
2
Coming soon

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Writeups

Writeup for True or False

baumroll1234

ja
True or False

22 hours ago

nirvana

Writeup for True or False

ja

2026/07/23 15:05

Daily AlpacaHackに挑戦するつくよみちゃん07/21/NOP Variant/tan90909090

ja

2026/07/21 16:33

nirvana

Writeup for Alpaca Blog

ja

2026/07/21 13:38

ojun

Writeup for no win func

ja

2026/07/19 15:04

kurimochi

Writeup for You've Got Shlex (shlex only)

ja

2026/07/19 05:58

Rows:

Lucky Redirect

Topic: GeneralReleased: Jul 3, 2026

140 solves
Web
Easy🌱3.0

by

tchen

tchen

Writeups

tchen

Writeup for Lucky Redirect

tchen

author
en

2026/07/06 07:33



Daily AlpacaHackに挑戦するつくよみちゃん07/03/Lucky Redirect/tchen

ja

2026/07/04 06:56


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