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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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Discussion with friends or AI is welcome (account sharing is prohibited).

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Today's Challenge
tchentchen
Greetings CGI
Web
Hard
12 solves
Submissions (latest 3)
bhcnumas

SOLVED!

Jul 17, 5:30 PM

kurgm
kurgm

SOLVED!

Jul 17, 5:29 PM

rsk0315

SOLVED!

Jul 17, 4:46 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🌱
1,982 solves
Upcoming challenges reveal the , , and in advance.
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Jul 2026

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Mon
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29
tchentchen
Nano Services
Web
Medium
87 solves
30
minaminaominaminao
Super Short System Exit
Misc
Medium
82 solves
1
admin
Alpaca Nation
Misc
Welcome🌱
208 solves
2
hiikunzhiikunz
Flag is A+B
Crypto
Easy🌱
124 solves
3
tchentchen
Lucky Redirect
Web
Easy🌱
119 solves
4
hiikunzhiikunz
Renda
Rev
Medium
102 solves
5
tchentchen
IP Blocked Secret
Web
Hard
63 solves
6
minaminaominaminao
duplicate entry
Misc
Easy🌱
125 solves
7
hiikunzhiikunz
Lazy RSA
Crypto
Medium
98 solves
8
minaminaominaminao
Let's Poly1305!
Crypto
Medium
75 solves
9
shiragishiragi
private method
Misc
Easy🌱
119 solves
10
hiikunzhiikunz
secret-table-3
Web
Medium
82 solves
11
baumroll1234
A slight mistake
Pwn
Hard
69 solves
12
tan90909090tan90909090
Compile time flag checker
Rev
Hard
56 solves
13
baumroll1234
Redirecting to Login Page
Web
Easy🌱
125 solves
14
tchentchen
You've Got Shlex
Misc
Medium
81 solves
15
minaminaominaminao
Let's Poly1305! 2
Crypto
Hard
61 solves
16
tchentchen
Beat the Alpaca Lord
Web
Medium
84 solves
17
pppp4649pppp4649
biribiri
Crypto
Medium
78 solves
18
tchentchen
Greetings CGI
Web
Hard
12 solves
19
hiikunzhiikunz
Planned topicStack
Pwn
Hard
20
Coming soon
21
Coming soon
22
Coming soon
23
Coming soon
24
Coming soon
25
minaminaominaminao
Planned topicCache
Web
Hard
26
tchentchen
Planned topicPython
Web
Hard
27
Coming soon
28
Coming soon
29
Coming soon
30
Coming soon
31
Coming soon
1
admin
Planned topicWelcome
Misc
Welcome🌱
2
Coming soon

Want a harder challenge?

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Writeups

Writeup for Beat the Alpaca Lord

baumroll1234

ja
Beat the Alpaca Lord

22 hours ago

tchen

Writeup for You've Got Shlex

tchen

author
en
You've Got Shlex

2026/07/16 01:15

tchen

Writeup for IP Blocked Secret

tchen

author
en
IP Blocked Secret

2026/07/15 23:53

Writeup for Let's Poly1305! 2

baumroll1234

ja
Let's Poly1305! 2

2026/07/15 16:06

Writeup for Redirecting to Login Page

hiro-1noue

ja
Redirecting to Login Page

2026/07/15 07:24

Writeup for Xmas Login Indo

bennettzy

id
Xmas Login

2026/07/15 07:00

Writeup for Alert my Flag

bennettzy

id
Alert my Flag

2026/07/14 14:26

Writeup for Redirecting to Login Page

baumroll1234

author
ja
Redirecting to Login Page

2026/07/14 13:20

Writeup for Lucky Redirect

okzkey

ja
Lucky Redirect

2026/07/14 01:15

Writeup for Redirecting to Login Page

okzkey

ja
Redirecting to Login Page

2026/07/14 01:13

Rows:

curl as a service

Topic: curlReleased: May 15, 2026

144 solves
WebMisc
Medium5.0

by

tan90909090

tan90909090

This is a service that executes curl command!

Beginner Hint
  • curl command is often used for HTTP protocol communication. However, it actually supports a variety of protocols.
  • In this challenge, there is a flag in a container that serving an SSH service. Let's search how to use an SSH protocol from curl command.
curl-as-a-service.tar.gz

Please sign in to submit the flag.

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