Misc CTF challenges

3,995 Misc CTF challenges from 420 CTFs (2011–2026), 705 with writeups.

Top misc techniques

Challenges

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Challenge	CTF	Weight	Has
two #one-gadget	HITCON 2017 Quals	69.38	files wu 1
snake #off-by-one #fastbin-attack #malloc-hook	SCTF 2020	–	files wu 1
BabyFactory #off-by-one #fastbin #unsorted-bin-leak #free-hook	PwnThyBytes 2019	25.00	files wu 1
bf #off-by-one #cpp-string #arbitrary-read-write	RCTF 2020	–	files wu 1
Almost #off-by-one	HacktivityCon 2020	21.86	files wu 1
OOMG_SPACE2 #off-by-null #info-leak	SunshineCTF 2020	23.34	files wu 1
nocaml #ocaml-jail-escape	UIUCTF 2025	–	files wu 1
PopGoesThePrinter #objective-c-reversing #oob-heap-leak #file-struct-overwrite #format-string	CSAW 2019 Quals	43.00	files wu 1
NeedForSpeed #nfs-filehandle	hxp 2024	–	files wu 1
Inception #nested-files	FE-CTF 2023	–	files wu 1
Flag_Extraction #nested-archives #binwalk-recursive-extraction	1337UP 2023	24.23	files wu 1
breakingout #negative-index #got-overwrite #one-gadget	WPICTF 2018	–	files wu 1
Quartet #multi-volume-zip	NahamCon 2025	53.77	files wu 1
Encoding #multi-layer-encoding #base32 #base64 #morse	1337UP 2023	24.23	files wu 1
zshfuck #misc #jail #zsh #restricted-charset	DiceCTF 2024 Quals	54.40	files wu 1
chest_mix #minecraft-nbt-parsing #region-file-forensics	b01lers 2024	30.80	files wu 1
Library #minecraft #save-file-analysis	SAS 2025 Quals	20.72	files wu 1
impossibler_pygolf #micropython #code-golf #grep-mbedtls-test-vector	RITSEC 2026	–	files wu 1
ai_clippy #mcp-exploitation #prompt-injection	UIUCTF 2025	–	files wu 1
Machbook #macos-heap-exploitation #libmalloc	Balsn 2019	25.00	files wu 1
Onlude #lu-decomposition #matrix-algebra-gf-p	Crypto 2021	36.00	files wu 1
Big_JPG #lsb-steganography #steghide	BlueHens 2023	24.61	files wu 1
Last_Standing_Bacaro #lsb-steganography	Bhackari 2026	–	files wu 1
Blue_Office #lcg-keystream #seed-bruteforce #known-plaintext	Crypto 2023	59.60	files wu 1
Symbols #latex-symbols #image-ocr	Crypto 2021	36.00	files wu 1
r3ticket #lagrange-interpolation #negative-index #linear-algebra	R3CTF 2026	35.95	files wu 1
BigMak #keyboard-layout-mapping	SunshineCTF 2025	51.65	files wu 1
Keyboard_Elitist #keyboard-layout-cipher	BroncoCTF 2024	22.51	files wu 1
Agent_P #keyboard-cipher	UMassCTF 2024	43.10	files wu 1
forgotten_module #kexec #kernel-boot	CONFidence 2020 Quals	24.96	files wu 1
network_card #kernel-stack-overflow	N1CTF 2018	24.41	files wu 1
babyk #kernel-ret2usr	m0leCon 2020 Quals	24.55	files wu 1
meowmow #kernel-exploitation #out-of-bounds (oob)#heap-overflow	zer0pts 2020	24.56	files wu 1
Race #kernel #race-condition #use-after-free (uaf)#slab-leak	De1CTF 2019	24.28	files wu 1
horses #js-sandbox-escape	Bhackari 2026	–	files wu 1
JSZone #js-engine-exploit #type-confusion #valueof-gc-callback #addrof-fakeobj	CTFZone 2018 Quals	23.92	files wu 1
jit-calc #jit-compiler #wx-memory #arbitrary-write #shellcode	RITSEC 2019	–	files wu 1
Functionless #javascript #functionless-exploit	TSG 2023	–	files wu 1
Club_Mate #integer-overflow #logic-bug	watevrCTF 2019	24.92	files wu 1
e #integer-overflow #floating-point	BraekerCTF 2024	24.72	files wu 1