Sylabs Singularity through 3.6.2 has Insecure Permissions on temporary directories used in explicit and implicit container build operations, a different vulnerability than CVE-2020-25039.
https://github.com/hpcng/singularity/security/advisories/GHSA-jv9c-w74q-6762
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00088.html
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00070.html