OSV-2026-1041 Heap-buffer-overflow in Assimp::ObjExporter::indexMap<Assimp::ObjExporter::vertexData, Assimp::ObjExport

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=531365119 Crash type: Heap-buffer-overflow WRITE 12 Crash state: Assimp::ObjExporter::indexMapAssimp::ObjExporter::vertexData, Assimp::ObjExport Assimp::ObjExporter::WriteGeometryFile Assimp::ObjExporter::ObjExporter...