Srdnlen CTF 2026 Quals
31 challenges with 16 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not. 21 of them also carry the solution Srdnlen CTF 2026 Quals’s own organisers published, which is linked on the challenge itself.
Full task list on CTFtimeUncategorised30
The upstream scoreboard did not say, so neither do we.
Published by the organisers in srdnlen/srdnlenctf-2026_public: solve/hash.cpp, solve/original.c, solve/solve.cpp
Also written up in: learnerxuan/CTF
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md, src/solve_echo.py, src/solve.py
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup/exploit.js, writeup/run.py, writeup/solver.py
Published by the organisers in srdnlen/srdnlenctf-2026_public: README.md, writeup/writeup.md, writeup/solve.py
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md, src/solve.py
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md, src/solve.py
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md, src/solve.py
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md, src/solve.py
Double Shop
2 official solutionsAlso written up in: jeff-160/CTF-writeups, jeff-160/CTF-writeups
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md, src/solve.py
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md, src/exploit_linx_wu.py
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md, src/solve.py
Artistic warmup
1 official solutionAlso written up in: bl0nnn/CTF-writeups
Published by the organisers in srdnlen/srdnlenctf-2026_public: solve.py
Common Offset
1 official solutionAlso written up in: learnerxuan/CTF
Cornflake v3.5
1 official solutionAlso written up in: learnerxuan/CTF
Also written up in: blog.davidherm.es
Graph Render Worker
1 official solutionAlso written up in: Dfmari/ctf_writeups
Graph Wasm
1 official solutionAlso written up in: Dfmari/ctf_writeups
Also written up in: learnerxuan/CTF
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md
Registered Stack
1 official solutionAlso written up in: learnerxuan/CTF
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup/writeup.md
Webpage
1 official solutionAlso written up in: Dfmari/ctf_writeups
Misc1
Everything that fits no other box: esolangs, puzzles, scripting exercises, and the jail escapes that have not yet earned their own category.
Published by the organisers in srdnlen/srdnlenctf-2026_public: writeup.md
Also written up in: MicheleMosca/CTF, MicheleMosca/CTF
Same technique in picoCTF: PW Crack 2, Permissions, Specialer