CVE-2020-3811: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

qmail-verify as used in netqmail 1.06 is prone to a mail-address verification bypass vulnerability.

Affected products

• Canonical Ubuntu Linux: version 20.04 only
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Netqmail Netqmail: version 1.06 only

Published 2020-05-26. Last modified 2026-06-17.