CVE-2018-13043: Canonical Ubuntu Linux

Critical severity, CVSS 9.8. EPSS: 2.5% chance of exploitation in the next 30 days.

scripts/grep-excuses.pl in Debian devscripts through 2.18.3 allows code execution through unsafe YAML loading because YAML::Syck is used without a configuration that prevents unintended blessing.

Affected products

• Canonical Ubuntu Linux: version 17.10 only; version 18.04 only
• Debian Devscripts: up to and including 2.18.3

Published 2018-07-01. Last modified 2026-06-17.