CVE-2021-31155: Umask Project Umask

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Failure to normalize the umask in please before 0.4 allows a local attacker to gain full root privileges if they are allowed to execute at least one command.

Affected products

• Umask Project Umask: before 0.4 (fixed in 0.4)

Published 2021-05-27. Last modified 2026-06-17.