CVE-2019-20478: Ruamel.yaml Project Ruamel.yaml

Critical severity, CVSS 9.8. EPSS: 6.8% chance of exploitation in the next 30 days.

In ruamel.yaml through 0.16.7, the load method allows remote code execution if the application calls this method with an untrusted argument. In other words, this issue affects developers who are unaware of the need to use methods such as safe_load in these use cases.

Affected products

• Ruamel.yaml Project Ruamel.yaml: up to and including 0.16.7

Published 2020-02-19. Last modified 2026-06-17.