CVE-2020-14154: Canonical Ubuntu Linux

Medium severity, CVSS 4.8. EPSS: 1.1% chance of exploitation in the next 30 days.

Mutt before 1.14.3 proceeds with a connection even if, in response to a GnuTLS certificate prompt, the user rejects an expired intermediate certificate.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 16.04 only; version 18.04 only; version 19.10 only; version 20.04 only
• Mutt Mutt: before 1.14.3 (fixed in 1.14.3)

Published 2020-06-15. Last modified 2026-06-17.