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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
rsk0315
Slipboard
Web
Hard
19 solves
Submissions (latest 3)
tadanobutubutu
tadanobutubutu

SOLVED!

May 29, 5:22 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🌱
1,831 solves
Upcoming challenges reveal the , , and in advance.
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May 2026

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27
shiragishiragi
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129 solves
28
seriotonserioton
unheard
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29
minaminaominaminao
permission denied
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30
minaminaominaminao
permission denied 2
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1
admin
Alpaca++
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2
tchentchen
Alpaca Rangers 2
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3
pppp4649pppp4649
Small N
Crypto
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4
hiikunzhiikunz
secret-table-2
Web
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147 solves
5
seriotonserioton
do the math
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117 solves
6
trimscashtrimscash
func-array
Pwn
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155 solves
7
minaminaominaminao
permission denied 3
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8
baumroll1234
Vending Machine
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181 solves
9
hiikunzhiikunz
reused n
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10
rsk0315
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11
seriotonserioton
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12
minaminaominaminao
hidden service
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13
tchentchen
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119 solves
14
minaminaominaminao
Equation Cipher
Crypto
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103 solves
15
tan90909090tan90909090
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Web
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118 solves
16
k0080k0080
Please Link This
Pwn
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80 solves
17
tan90909090tan90909090
curl as a service 2
Web
Misc
Hard
94 solves
18
shiragishiragi
Flag for Switch
Web
Easy🌱
170 solves
19
pppp4649pppp4649
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108 solves
20
tchentchen
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Web
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21
kakur41kakur41
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Misc
Medium
109 solves
22
nozokare
Time Travelers' OTP
Web
Medium
90 solves
23
minaminaominaminao
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Crypto
Hard
62 solves
24
k0080k0080
25
minaminaominaminao
Catrunner
Misc
Easy🌱
105 solves
26
baumroll1234
I cannot decrypt RSA
Crypto
Medium
84 solves
27
tchentchen
Hello Programmer!
Web
Medium
72 solves
28
shiragishiragi
AlpacaForm
Rev
Medium
78 solves
29
pppp4649pppp4649
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Crypto
Medium
73 solves
30
rsk0315
Slipboard
Web
Hard
19 solves
31
ptr-yudaiptr-yudai
Planned topicStack
Pwn
Hard

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Writeups

tadanobutubutu

Writeup for Decrypt Shop

tadanobutubutu

ja
Decrypt Shop

50 minutes ago

nitcelcius

Writeup for Decrypt Shop (btw I don't like math)

Daily AlpacaHackに挑戦するつくよみちゃん 05/28/AlpacaForm/shiragi

ja

2026/05/28 15:47

tadanobutubutu

Writeup for AlpacaForm

ja

2026/05/28 15:11

tadanobutubutu

Writeup for Hello Programmer!

Rows:

Slipboard

Topic: XSSReleased: May 30, 2026

19 solves
Web
Hard

by

rsk0315

USER

SOLVED AT

tadanobutubutu

tadanobutubutu

43 minutes ago

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