{"id":"CVE-2023-24620","aliases":["EUVD-2023-2362","GHSA-vj49-j7rc-h54f"],"status":"published","title":"Esoteric YamlBeans XML Entity Expansion vulnerability","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.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.00364,"percentile":0.30507,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400","CWE-611"],"published":"2023-08-25T00:00:00Z","modified":"2026-10-28T02:30:22Z","affected":[{"source":"ghsa","ecosystem":"Maven","package":"com.esotericsoftware.yamlbeans:yamlbeans","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.15"}]}]},{"source":"osv","ecosystem":"Maven","package":"com.esotericsoftware.yamlbeans:yamlbeans","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.15"}]}],"versions":["1.06","1.08","1.09","1.11","1.12","1.13","1.14","1.15"]}],"products":[{"vendor":"esotericsoftware","product":"yamlbeans"}],"references":[{"url":"https://github.com/EsotericSoftware","tags":["x_transferred","Third Party Advisory","web"]},{"url":"https://contrastsecurity.com","tags":["x_transferred","Third Party Advisory","web"]},{"url":"https://github.com/Contrast-Security-OSS/yamlbeans/blob/main/SECURITY.md","tags":["x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-24620","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vj49-j7rc-h54f"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/24xxx/CVE-2023-24620.json","tags":["advisory"]},{"url":"https://github.com/EsotericSoftware/yamlbeans","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-24620","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.","status":"published","published":"2023-08-25T00:00:00Z","modified":"2024-10-02T18:08:16.309Z","updated_at":"2026-11-02T14:35:27.006218Z"}],"euvd":[{"id":"EUVD-2023-2362","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.","status":"published","published":"2023-08-25T00:00:00Z","modified":"2024-10-02T18:08:16Z","updated_at":"2026-11-03T00:27:57.212945Z"}],"ghsa":[{"id":"GHSA-vj49-j7rc-h54f","title":"Esoteric YamlBeans XML Entity Expansion vulnerability","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.","status":"published","published":"2023-08-25T21:30:48Z","modified":"2023-11-09T05:01:01Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-400","CWE-611"],"updated_at":"2026-11-02T14:37:17.64478Z"}],"nvd":[{"id":"CVE-2023-24620","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.","status":"published","published":"2023-08-25T20:15:07.893Z","modified":"2026-06-17T05:39:40.13Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-611"],"updated_at":"2026-11-02T14:08:25.025396Z"}],"osv":[{"id":"GHSA-vj49-j7rc-h54f","title":"Esoteric YamlBeans XML Entity Expansion vulnerability","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.","status":"published","published":"2023-08-25T21:30:48Z","modified":"2024-02-16T08:20:00.20935Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-400","CWE-611"],"updated_at":"2026-11-02T15:46:57.348035Z"},{"id":"CVE-2023-24620","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.","status":"published","published":"2023-08-25T00:00:00Z","modified":"2026-10-28T02:30:22.387202878Z","updated_at":"2026-11-02T15:44:30.709518Z"}]}}