AlpacaHack Logo
Sign InSign Up
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!

Join Anytime

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

Not a Competition

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

Solution Sharing Rules

Sharing solutions is allowed only after 24 hours have passed since release.

Solve stats

0

/176

No solved challenges yet.

Sign In to view your player stats

Today's Challenge
minaminaominaminao
Catrunner
Misc
Easy🌱
32 solves
Submissions (latest 3)
cqbtq

SOLVED!

May 24, 7:52 PM

kodai

SOLVED!

May 24, 4:48 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🌱
1,816 solves
Upcoming challenges reveal the , , and in advance.
Prev

May 2026

Next
Solved
Unsolved
Upcoming
Mon
Tue
Wed
Thu
Fri
Sat
Sun
27
shiragishiragi
Unrevealed TXT
Misc
Easy🌱
128 solves
28
seriotonserioton
unheard
Misc
Medium
77 solves
29
minaminaominaminao
permission denied
Misc
Hard
81 solves
30
minaminaominaminao
permission denied 2
Misc
Medium
82 solves
1
admin
Alpaca++
Misc
Welcome🌱
248 solves
2
tchentchen
Alpaca Rangers 2
Web
Easy🌱
208 solves
3
pppp4649pppp4649
Small N
Crypto
Easy🌱
154 solves
4
hiikunzhiikunz
secret-table-2
Web
Medium
145 solves
5
seriotonserioton
do the math
Misc
Medium
114 solves
6
trimscashtrimscash
func-array
Pwn
Easy🌱
147 solves
7
minaminaominaminao
permission denied 3
Misc
Medium
115 solves
8
baumroll1234
Vending Machine
Misc
Easy🌱
177 solves
9
hiikunzhiikunz
reused n
Crypto
Medium
115 solves
10
rsk0315
Bounds Checking
Pwn
Hard
86 solves
11
seriotonserioton
Mirage
Rev
Easy🌱
124 solves
12
minaminaominaminao
hidden service
Misc
Medium
102 solves
13
tchentchen
Super Short Python Golf
Misc
Medium
117 solves
14
minaminaominaminao
Equation Cipher
Crypto
Medium
100 solves
15
tan90909090tan90909090
curl as a service
Web
Misc
Medium
112 solves
16
k0080k0080
Please Link This
Pwn
Hard
76 solves
17
tan90909090tan90909090
curl as a service 2
Web
Misc
Hard
89 solves
18
shiragishiragi
Flag for Switch
Web
Easy🌱
153 solves
19
pppp4649pppp4649
Small d
Crypto
Medium
102 solves
20
tchentchen
Kakuzuke
Web
Medium
106 solves
21
kakur41kakur41
Python:Impossible
Misc
Medium
102 solves
22
nozokare
Time Travelers' OTP
Web
Medium
79 solves
23
minaminaominaminao
Even Worse RSA
Crypto
Hard
55 solves
24
k0080k0080
25
minaminaominaminao
Catrunner
Misc
Easy🌱
32 solves
26
baumroll1234
Planned topicRSA
Crypto
Medium
27
Planned topicCSP
Web
Medium
28
Coming soon
29
Planned topicRSA
Crypto
Medium
31
Planned topicStack
Pwn
Hard

Want a harder challenge?

Go to B-SIDE

Writeups

Daily AlpacaHackに挑戦するつくよみちゃん 05/24 rev/Conquer Ultimate Device Abyss/k0080

tsukuyomi-chan

ja
Conquer Ultimate Device Abyss

2 hours ago

tadanobutubutu

Writeup for Conquer Ultimate Device Abyss

tadanobutubutu

Writeup for Even Worse RSA

Daily AlpacaHackに挑戦するつくよみちゃん 05/23 crypto/Even Worser RSA/minaminao

Rows:

Catrunner

Topic: Path TraversalReleased: May 25, 2026

32 solves
Misc
Easy🌱

by

minaminao

minaminao

🐈️ 💨💨💨

NOTE: This challenge is related to Bashrunner and Pyrunner, but solving them first isn't required.

catrunner.tar.gz

Please sign in to submit the flag.

descriptionsolves