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.

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Today's Challenge

Submissions (latest 3)

shinyaaaaa

SOLVED!

Apr 12, 1:12 PM

muhammed

SOLVED!

Apr 12, 12:58 PM

lluuiiggee

SOLVED!

Apr 12, 12:56 PM

Leaderboard

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Try the first challenge

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

Upcoming challenges reveal the , , and in advance.

Mar 2026

Solved

Unsolved

Upcoming

Mon

Tue

Wed

Thu

Fri

Sat

Sun

kakur41

Alpaca Quest

Rev

Medium

115 solves

minaminao

hit-and-hit

Misc

Hard

86 solves

tchen

Alpaca Rangers

Web

Medium

148 solves

kurenaif

One Byte Padding Oracle Attack

Crypto

Hard

74 solves

tchen

Rock Paper Scissors Lizard Spock

Web

Hard

96 solves

minaminao

pyjs

Misc

Hard

82 solves

admin

Alpaca meets QR

Misc

Welcome

306 solves

kakur41

Bars

Web

Easy

298 solves

tan90909090

glibc's secret function

Rev

Easy

195 solves

minaminao

Flag Printer 2026

Misc

Easy

204 solves

tchen

Alert my Flag

Web

Medium

167 solves

mora

magic number

Misc

Medium

124 solves

theoremoon

high and low

Crypto

Hard

87 solves

ark

guess.js

Misc

Hard

103 solves

minaminao

FLAG OVER

Misc

Medium

115 solves

ark

💯

Misc

Medium

116 solves

pppp4649

Find XOR key

Crypto

Easy

150 solves

colza

kappa overflow

Pwn

Medium

121 solves

tchen

Another Login Challenge

Web

Medium

124 solves

asusn

Heuristic IPPON

Misc

Easy

167 solves

minaminao

flag.txt

Misc

Hard

110 solves

pppp4649

The future path

Crypto

Medium

92 solves

tchen

Free Coupon

Web

Medium

135 solves

ark

PPPPParse

Misc

Medium

98 solves

rsk0315

Flags for the FLAG

Misc

Easy

149 solves

colza

canary leak

Pwn

Medium

106 solves

chocorusk

Alpacker

Rev

Hard

78 solves

k0080

vuln4vuln

Pwn

Hard

96 solves

kanon

bloom

Crypto

Medium

86 solves

tchen

What's Next

Web

Medium

110 solves

kurenaif

crypto_666

Crypto

Medium

105 solves

tan90909090

Optimized expression

Rev

Easy

115 solves

minaminao

encrypted-p

Crypto

Medium

100 solves

hiikunz

EncodeDecode

Misc

Hard

85 solves

tchen

Dot Chain

Misc

Hard

84 solves

tchen

Tar Uploader

Web

Medium

101 solves

blackade

silence

Misc

Medium

99 solves

admin

OSINT

Misc

Welcome

273 solves

tchen

Message For You

Web

Easy

187 solves

pppp4649

You are my friend

Crypto

Easy

154 solves

hiikunz

Impossible Puzzle

Web

Easy

178 solves

kanon

The Horn

Crypto

Medium

97 solves

Want a harder challenge?

Go to B-SIDE

Writeups

Writeup for Daily AlpacaHack 4/5-4/11 kakur41 ja AES is dead +6 9 hours ago
Writeup for pacapaca sc tadanobutubutu ja pacapaca sc 19 hours ago
Writeup for Daily AlpacaHack 3/2-3/8 labpump ja Alert my Flag +6 yesterday
Writeup for No Content nozokare ja No Content yesterday
Writeup for Panic nozokare ja Panic yesterday
Writeup for AES is dead nozokare ja AES is dead yesterday
Writeup for AES is dead baumroll1234 ja AES is dead yesterday
Writeup for AES is dead 02loveslollipop en AES is dead yesterday
Writeup for AES is dead tadanobutubutu ja AES is dead yesterday
Writeup for 1️⃣ paulayground ko 1️⃣ 2 days ago

Rows:

Panic

Topic: Server-SideReleased: Apr 9, 2026

120 solves

Web

Medium

Author:

ark

Uncaught AlpacaError: Cannot convert object to primitive alpaca

panic.tar.gz

description solves writeups