CVE-2018-14357: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 5% chance of exploitation in the next 30 days.

An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They allow remote IMAP servers to execute arbitrary commands via backquote characters, related to the mailboxes command associated with an automatic subscription.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Mutt Mutt: before 1.10.1 (fixed in 1.10.1)
• Neomutt Neomutt: before 20180716 (fixed in 20180716)
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server Eus: version 7.5 only; version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server Tus: version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only

Published 2018-07-17. Last modified 2026-06-17.