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.
References (3)
Core 3
Core References
Third Party Advisory
https://contrastsecurity.com
Exploit, Third Party Advisory
https://github.com/Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md
Third Party Advisory
https://github.com/EsotericSoftware
Scores
CVSS v3
5.5
EPSS
0.0036
EPSS Percentile
27.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-611
Status
published
Products (2)
com.esotericsoftware.yamlbeans/yamlbeans
0Maven
esotericsoftware/yamlbeans
< 1.15
Published
Aug 25, 2023
Tracked Since
Feb 18, 2026