CVE-2023-24620: Esotericsoftware Yamlbeans

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in Esoteric YamlBeans through 1.15. A crafted YAML document is able perform am XML Entity Expansion attack against YamlBeans YamlReader. By exploiting the Anchor feature in YAML, it is possible to generate a small YAML document that, when read, is expanded to a large size, causing CPU and memory consumption, such as a Java Out-of-Memory exception.

Affected products

• Esotericsoftware Yamlbeans: up to and including 1.15

Published 2023-08-25. Last modified 2026-06-17.