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

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Sharing solutions is allowed only after the challenge period has ended.

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Today's Challenge

Long Long Flag Printer 2026

Submissions (latest 3)

SOLVED!

Aug 2, 8:08 PM

SOLVED!

Aug 2, 5:09 PM

SOLVED!

Aug 2, 5:07 PM

Leaderboard

Period

Try the first challenge

Is this your first CTF? Let's begin by tackling the first challenge released on Daily AlpacaHack.

AlpacaHack 2100

Upcoming challenges reveal the , , and in advance.

Aug 2026

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27

tchen

Web

Easy🌱

110 solves

28

2501

One More Approval

Crypto

Medium

55 solves

29

2501

Misc

Medium

61 solves

30

2501

Misc

Medium

54 solves

31

tchen

Small Image Uploader 2

Web

Medium

51 solves

1

admin

Día Nacional de la Alpaca

Misc

Welcome🌱

106 solves

2

2501

Password, Please

Misc

Easy🌱

83 solves

3-4

ark

Long Long Flag Printer 2026

Misc

Medium

17 solves

5

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Want a harder challenge?

Writeups

Writeup for Password, Please

baumroll1234

ja

Password, Please

2 hours ago

Writeup for Password, Please

nirvana

ja

Password, Please

3 hours ago

Writeup for Día Nacional de la Alpaca

baumroll1234

ja

Día Nacional de la Alpaca

23 hours ago

Writeup for IP Blocked Secret

sota70

ja

IP Blocked Secret

2026/08/01 08:33

Writeup for Greetings i18n

michikusamichiya

ja

2026/08/01 05:34

Writeup for Small Image Uploader 2

toshiconner

ja

Small Image Uploader 2

2026/07/31 23:24

Writeup for Cache Me If You Can 2

kurgm

ja

Cache Me If You Can 2

2026/07/31 16:13

Writeup for Anyrunner

nitcelcius

ja

2026/07/31 07:46

Writeup for Anyrunner

baumroll1234

ja

2026/07/30 15:56

Writeup for One More Approval

kurimochi

ja

One More Approval

2026/07/29 15:27

Rows:

Flag Printer 2026

Topic: NetworkReleased: Mar 4, 2026

239 solves

Easy🌱3.0

by

minaminao

Tags

f ~~~~~~~~~~~~~~~~~~~~ l ~~~~~~~~~~~~~~~~~~~~ a ~~~~~~~~~~~~~~~~~~~~ g ~~~~~~~~~~~~~~~~~~~~

Beginner Hint

When you connect using nc, you can see that the part of the flag after Alpaca{ is not printed.
If you read the Dockerfile, you may understand why this happens.

flag-printer-2026.tar.gz

description solves writeups