I have a doubt about the affected versions. This is fixed in our package by https://github.com/assimp/assimp/commit/30f17aa20 /data/misc/assimp (master) # git tag --contains 30f17aa20 v5.1.0 v5.1.1 v5.1.2 v5.1.3 v5.1.4 v5.1.5 Version 3.3.1 is not affected.