{"cve":"CVE-2023-24620","nvd":{"published":"2023-08-25T20:15:07.893","modified":"2026-06-17T05:39:40.130","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-611"],"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"],"products":["esotericsoftware:yamlbeans"],"source":"nvd","synced_at":"2026-10-19T21:39:14.809778102+00:00"},"epss":{"cve":"CVE-2023-24620","score":0.00364,"percentile":0.30248,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vj49-j7rc-h54f","url":"https://osv.dev/vulnerability/GHSA-vj49-j7rc-h54f","summary":"Esoteric YamlBeans XML Entity Expansion vulnerability","modified":"2024-02-16T08:20:00.209350Z","packages":[{"ecosystem":"Maven","name":"com.esotericsoftware.yamlbeans:yamlbeans","purl":"pkg:maven/com.esotericsoftware.yamlbeans/yamlbeans","ranges":["<=1.15"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}