CVE-2026-72590: Alseambusher Crontab-UI

Critical severity, CVSS 9.8. EPSS: 2% chance of exploitation in the next 30 days.

An OS command injection vulnerability in alseambusher/crontab-ui through 0.4.2 allows an unauthenticated remote attacker to inject arbitrary cron job entries by sending a crafted GET request to /crontab with URL-encoded newlines in the env_vars parameter.

Affected products

• Alseambusher Crontab-UI: up to and including 0.4.2

Published 2026-08-10. Last modified 2026-08-28.