This release reflects the latest stable version, including many bug fixes, including some potentially security related. As noted with our 3.2.0 release, we anticipate further bug-fix releases over the course of 2026 and appreciate the many contributions and reports from everyone. 🪲 Bug Fixes Fix tetrazole protonation handling in the pH model by @Jnelen in https://github.com/openbabel/openbabel/pull/2975 ChemDraw CDX: handle additional aromatic/fractional bond-order codes by @jlkjr in https://github.com/openbabel/openbabel/pull/2979 🔒 Security and Hardening Fix CVE-2026-54751: MMD parser uninitialized value use can expose prior atom data by Carmelo Lin @Carmel0 Update SECURITY.md with GitHub Security Advisory links by @ghutchis in https://github.com/openbabel/openbabel/pull/2968 Fix several formats with sscanf validation by @ghutchis in https://github.com/openbabel/openbabel/pull/2973 Fix more fuzz bugs by @ghutchis in https://github.com/openbabel/openbabel/pull/2977 Fix stack overflow in gaussformat and cube by @ghutchis in https://github.com/openbabel/openbabel/pull/2985 Fix additional crashes from fuzz testing by @ghutchis in https://github.com/openbabel/openbabel/pull/2986 Fix more reported crashes by @ghutchis in https://github.com/openbabel/openbabel/pull/2988 Fix integer overflow issues by @ghutchis in https://github.com/openbabel/openbabel/pull/2989 Fix more bug / crash reports by @ghutchis in https://github.com/openbabel/openbabel/pull/2990 Fix more crash / fuzz reports by @ghutchis in https://github.com/openbabel/openbabel/pull/2991 Credits to: Carmelo Lin @Carmel0 @cybershubham06 @Pig-Tail @manus-use @damseleng 🛠️ Build Changes For now, modify build wheels to take an explicit version number by @ghutchis in https://github.com/openbabel/openbabel/pull/2963 CMake: Don't look for wxWidgets unless the GUI is requested by @berquist in https://github.com/openbabel/openbabel/pull/2964 refactor: remove MIN and MAX macros by @e-kwsm in https://github.com/openbabel/openbabel/pull/2970 fix bindings_php build issues by @e-kwsm in https://github.com/openbabel/openbabel/pull/2971 build(python): write _openbabel.so under build directory instead of source directory by @e-kwsm in https://github.com/openbabel/openbabel/pull/2974 Fix headers with system InChi by @PPN-SD in https://github.com/openbabel/openbabel/pull/2969 build(plugin_descriptors): properly set the include directory of InChI by @e-kwsm in https://github.com/openbabel/openbabel/pull/2982 chore: update downloads badge, from SF to GH [skip ci] by @e-kwsm in https://github.com/openbabel/openbabel/pull/2966 docs: fix PAPER_TYPE and configure PROJECT_NUMBER by @e-kwsm in https://github.com/openbabel/openbabel/pull/2981 Parse openbabel-x-y-z tags for version numbers by @ghutchis in https://github.com/openbabel/openbabel/pull/2967 New Contributors @berquist made their first contribution in https://github.com/openbabel/openbabel/pull/2964 @Jnelen made their first contribution in https://github.com/openbabel/openbabel/pull/2975 @jlkjr made their first contribution in https://github.com/openbabel/openbabel/pull/2979 Full Changelog: https://github.com/openbabel/openbabel/compare/openbabel-3-2-0...openbabel-3-2-1