{"id":"CVE-2021-20089","details":"Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in purl 2.3.2 allows a malicious user to inject properties into Object.prototype.","modified":"2026-03-14T10:37:51.796533Z","published":"2021-04-23T19:15:11.140Z","references":[{"type":"EVIDENCE","url":"https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/purl.md"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/allmarkedup/purl","events":[{"introduced":"0"},{"last_affected":"6df9a03833ebbd479baede1e0111186a5d9906a2"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"2.3.2"}]}}],"versions":["2.3.2","v1.1","v2.0","v2.2","v2.2.1","v2.3","v2.3.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20089.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}