Sylabs Singularity 3.2.0 through 3.6.2 has Insecure Permissions on temporary directories used in fakeroot or user namespace container execution.
https://github.com/hpcng/singularity/security/advisories/GHSA-w6v2-qchm-grj7
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00088.html
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00070.html