CVE-2018-12557: Zuul-Ci Zuul

Critical severity, CVSS 9.8. EPSS: 1.9% chance of exploitation in the next 30 days.

An issue was discovered in Zuul 3.x before 3.1.0. If nodes become offline during the build, the no_log attribute of a task is ignored. If the unreachable error occurred in a task used with a loop variable (e.g., with_items), the contents of the loop items would be printed in the console. This could lead to accidentally leaking credentials or secrets.

Affected products

• Zuul-Ci Zuul: from 3.0.0, before 3.1.0 (fixed in 3.1.0)

Published 2018-06-19. Last modified 2026-06-17.