CVE-2019-14855: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.

Affected products

• Canonical Ubuntu Linux: version 18.04 only
• Fedoraproject Fedora: version 30 only; version 31 only
• Gnupg Gnupg: before 2.2.18 (fixed in 2.2.18)

Published 2020-03-20. Last modified 2026-06-17.