{"id":"CVE-2020-28270","aliases":["EUVD-2021-2201","GHSA-fxwf-45c7-4ppr"],"status":"published","title":"Prototype pollution in object-hierarchy-access","description":"Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.03846,"percentile":0.9027,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-915"],"published":"2020-11-12T17:16:50Z","modified":"2026-10-20T10:53:04Z","fixes":[{"ecosystem":"npm","package":"object-hierarchy-access","fixed_in":["0.33.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"object-hierarchy-access","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.2.0"},{"fixed":"0.33.0"}]}]},{"source":"osv","ecosystem":"npm","package":"object-hierarchy-access","ranges":[{"type":"SEMVER","events":[{"introduced":"0.2.0"},{"fixed":"0.33.0"}]}]}],"products":[{"vendor":"mjpclab","product":"object-hierarchy-access"}],"references":[{"url":"https://github.com/mjpclab/object-hierarchy-access/commit/7b1aa134a8bc4a376296bcfac5c3463aef2b7572","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28270","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28270","tags":["advisory"]},{"url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2020-28270,","tags":["web"]},{"url":"https://github.com/advisories/GHSA-fxwf-45c7-4ppr"},{"url":"https://github.com/mjpclab/object-hierarchy-access","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-28270","description":"Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2020-11-12T17:16:50Z","modified":"2024-08-04T16:33:58.388Z","updated_at":"2026-11-02T14:35:57.017407Z"}],"euvd":[{"id":"EUVD-2021-2201","description":"Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2020-11-12T17:16:50Z","modified":"2024-08-04T16:33:58Z","updated_at":"2026-11-03T03:07:10.123634Z"}],"ghsa":[{"id":"GHSA-fxwf-45c7-4ppr","title":"Prototype pollution in object-hierarchy-access","description":"Overview:Prototype pollution vulnerability in ‘object-hierarchy-access’ versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-10-12T16:40:58Z","modified":"2023-02-01T05:06:23Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-915","CWE-1321"],"updated_at":"2026-11-02T14:36:38.281533Z"}],"nvd":[{"id":"CVE-2020-28270","description":"Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2020-11-12T18:15:15.877Z","modified":"2026-06-17T03:10:15.28Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:06:24.137599Z"}],"osv":[{"id":"CVE-2020-28270","description":"Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2020-11-12T18:15:15.877Z","modified":"2026-10-20T10:53:04.116567617Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:16.248747Z"},{"id":"GHSA-fxwf-45c7-4ppr","title":"Prototype pollution in object-hierarchy-access","description":"Overview:Prototype pollution vulnerability in ‘object-hierarchy-access’ versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-10-12T16:40:58Z","modified":"2023-11-08T04:03:24.526907Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-1321","CWE-915"],"updated_at":"2026-11-02T15:46:47.119724Z"}]}}