CVE-2020-26238: Cron-Utils Project Cron-Utils

High severity, CVSS 8.1. EPSS: 4.2% chance of exploitation in the next 30 days.

Cron-utils is a Java library to parse, validate, migrate crons as well as get human readable descriptions for them. In cron-utils before version 9.1.3, a template Injection vulnerability is present. This enables attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. Only projects using the @Cron annotation to validate untrusted Cron expressions are affected. This issue was patched in version 9.1.3.

Affected products

• Cron-Utils Project Cron-Utils: before 9.1.3 (fixed in 9.1.3)

Published 2020-11-25. Last modified 2026-06-17.