CVE-2017-18640: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 26.7% chance of exploitation in the next 30 days.

The Alias feature in SnakeYAML before 1.26 allows entity expansion during a load operation, a related issue to CVE-2003-1564.

Affected products

• Fedoraproject Fedora: version 31 only; version 32 only
• Oracle PeopleSoft Enterprise Pt PeopleTools: version 8.56 only; version 8.57 only; version 8.58 only
• Quarkus Quarkus: up to and including 1.3.4
• Snakeyaml Project Snakeyaml: before 1.26 (fixed in 1.26)

Published 2019-12-12. Last modified 2026-06-17.