CVE-2021-3803: Debian Linux

High severity, CVSS 7.5. EPSS: 2.2% chance of exploitation in the next 30 days.

nth-check is vulnerable to Inefficient Regular Expression Complexity

Affected products

• Debian Debian Linux: version 10.0 only
• Nth-Check Project Nth-Check: before 2.0.1 (fixed in 2.0.1)

Published 2021-09-17. Last modified 2026-06-17.