The lib3mf library is an open-source implementation of the 3MF file format and standard, mainly used for 3D-printing. An attacker could send a specially crafted file to create a use-after-free condition. Cisco Talos worked with 3MF Consortium to ensure that this issue is resolved and that an update is available for affected customers. The 3MF standard has been adopted in a variety of products and is used in programs like OpenSCAD and LibCGAL.”]
Source: https://blog.talosintelligence.com/2021/03/vuln-spotlight-3mf-lib-.html