Advanced Fuzzing League

We want to make fuzzing better and better

Follow for updates on AFL++ & LibAFL

LibAFL: https://github.com/AFLplusplus/LibAFL
AFL++: https://github.com/AFLplusplus/AFLplusplus
web: https://aflplus.plus
bluesky: https://bsky.app/profile/aflplusplus.bsky.social

Last Notes

2026-06-29 09:22:14 GMT

AFL++ 5.02c release! important bugfix release for persistent fuzzing mode. New afl-health tool, C11 guidance instrumentation (helps coverage!). https://github.com/AFLplusplus/AFLplusplus/releases/tag/v5.02c #fuzzing #afl

2026-06-18 09:25:14 GMT

AFL++ 5.01c release! Bug fixes, faster persistent fuzzing, better MOpt mutator, new qemu binary-only alternative, etc. https://github.com/AFLplusplus/AFLplusplus/releases #afl #fuzzing

2026-03-13 09:28:38 GMT

AFL++ v4.40c release - best performance ever - optimal hidden coverage instrumentation, FrameShift, LLVM 22 support, IJON fixes, a lot of minor and bigger enhancements! #fuzzer #fuzzing https://github.com/AFLplusplus/AFLplusplus/releases/tag/v4.40c

2025-12-26 12:10:55 GMT

AFL++ 4.35c release! Complete hidden coverage gathering, GUIFuzz++ support, IJON for qemu, various fixes! https://github.com/AFLplusplus/AFLplusplus/releases/tag/v4.35c #fuzzing #fuzzer

2025-11-12 15:31:15 GMT

LibAFL 0.15.4 has just been released 🎉
Of the 30 Contributers for this release, almost half are new faces <3
https://github.com/AFLplusplus/LibAFL/releases/tag/0.15.4
#Fuzzing #LibAFL #AFLplusplus

2025-04-26 13:58:41 GMT

AFL++ v4.32c release - mostly minor bug fixes and improvements, LLVM 20 users should update! https://github.com/AFLplusplus/AFLplusplus/releases/tag/v4.32c #afl #fuzzing #fuzzing-tools #fuzzingtools

2025-03-31 16:09:05 GMT

🚨 LibAFL 0.15.2 🚨 <li>Rust 2024 edition</li><li>LibAFL_Unicorn</li><li>Use LibAFL rand types for other crates</li><li>Allow logging to StatsD</li><li>LibAFL_QEMU updates like binary-only ASan in Rust 🦀🦀🦀, inputs via StdIn, better snapshots</li>
And so much more:
https://github.com/AFLplusplus/LibAFL/releases/tag/0.15.2
#LibAFL #Fuzzing #AFLplusplus

2025-02-10 12:51:35 GMT

Just released AFL++ v4.31c: SAND mode, LLVM 20 support, Python 3.13 support, bug fixes, better performance ... https://github.com/AFLplusplus/AFLplusplus/releases/tag/v4.31c

2025-01-21 01:24:31 GMT

We've just released #LibAFL 0.15.0 - A big step toward 1.0 stable!
Featuring<li>Mutators for Numeric Types</li><li>Bloomfilter-based deduplication for to-be-executed inputs</li><li>Nyx hypercall API support for LibAFL QEMU and new utilities for binary-only fuzzing</li><li>...<a href="https://github.com/AFLplusplus/LibAFL/releases/tag/0.15.0" target="_blank" rel="nofollow noopener" translate="no">https://github.com/AFLplusplus/LibAFL/releases/tag/0.15.0</a></li>

2024-12-03 14:53:56 GMT

We just released AFL++ v4.30c - deprecate afl-gcc/clang, fast resume support, lots of improvements. https://github.com/AFLplusplus/AFLplusplus/releases/tag/v4.30c #afl #fuzzer #fuzzing

2024-11-14 04:01:11 GMT

We've released #LibAFL 0.14 with an afl-fuzz rewrite in #LibAFL, better QEMU, FRIDA scripting, intel_pt tracing support and more!
Check it out:
https://github.com/AFLplusplus/LibAFL/releases/tag/0.14.0