Esoteric YamlBeans XML Entity Expansion vulnerability
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | com.esotericsoftware.yamlbeans:yamlbeans | <= 1.15 | no fix |
References
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400, CWE-611- Platform
- Java / Kotlin (Maven)
- Package
com.esotericsoftware.yamlbeans:yamlbeans- Disclosed
- 25.08.2023
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vj49-j7rc-h54f - CC BY 4.0
Vulnerability history: com.esotericsoftware.yamlbeans:yamlbeans
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 08.2023 08.2023
- Without a fix
- 2
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2023: 2
- 2024: 0
- 2025: 0
- 2026: 0
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Esoteric YamlBeans XML Entity Expansion vulnerability this entry
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