What’s Vulnerable › Vulnerabilities

CVE-2023-24620

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-08-25 · updated 2026-06-17
• Weakness: CWE-611

Description

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: through 1.15

References

• https://contrastsecurity.com
• https://github.com/Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md
• https://github.com/EsotericSoftware
• https://contrastsecurity.com
• https://github.com/Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md
• https://github.com/EsotericSoftware

Get alerted when CVE-2023-24620 or the next vulnerability affects your stack