{"id":"CVE-2021-40663","aliases":["EUVD-2022-6215","GHSA-3829-mgmw-jcg4"],"status":"published","title":"Prototype Pollution in deep.assign","description":"deep.assign npm package 0.0.0-alpha.0 is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').","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":"2026-11-09","score":0.01794,"percentile":0.78572,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321"],"published":"2022-06-30T11:52:46Z","modified":"2026-06-17T04:07:14Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"deep.assign","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.0.0-alpha.0"},{"last_affected":"0.0.0-alpha.0"}]}],"versions":["0.0.0-alpha.0"]},{"source":"osv","ecosystem":"npm","package":"deep.assign","versions":["0.0.0-alpha.0"]}],"products":[{"vendor":"deep.assign_project","product":"deep.assign"}],"references":[{"url":"https://github.com/janbialostok/deep-assign/issues/1","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","web"]},{"url":"https://www.npmjs.com/package/deep.assign","tags":["x_refsource_MISC","x_transferred","Product","Third Party Advisory","web"]},{"url":"https://security.netapp.com/advisory/ntap-20220826-0002/","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40663","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-3829-mgmw-jcg4"},{"url":"https://github.com/janbialostok/deep-assign","tags":["package"]},{"url":"https://security.netapp.com/advisory/ntap-20220826-0002","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-40663","description":"deep.assign npm package 0.0.0-alpha.0 is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').","status":"published","published":"2022-06-30T11:52:46Z","modified":"2024-08-04T02:51:06.636Z","updated_at":"2026-11-02T14:33:01.852999Z"}],"euvd":[{"id":"EUVD-2022-6215","description":"deep.assign npm package 0.0.0-alpha.0 is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').","status":"published","published":"2022-06-30T11:52:46Z","modified":"2024-08-04T02:51:06Z","updated_at":"2026-11-03T03:24:19.692229Z"}],"ghsa":[{"id":"GHSA-3829-mgmw-jcg4","title":"Prototype Pollution in deep.assign","description":"deep.assign npm package 0.0.0-alpha.0 is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').","status":"published","published":"2022-07-01T00:01:14Z","modified":"2023-01-29T05:06:02Z","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"],"updated_at":"2026-11-02T14:36:25.835323Z"}],"nvd":[{"id":"CVE-2021-40663","description":"deep.assign npm package 0.0.0-alpha.0 is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').","status":"published","published":"2022-06-30T12:15:08.297Z","modified":"2026-06-17T04:07:14.37Z","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":"2026-11-02T14:07:06.501652Z"}],"osv":[{"id":"GHSA-3829-mgmw-jcg4","title":"Prototype Pollution in deep.assign","description":"deep.assign npm package 0.0.0-alpha.0 is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').","status":"published","published":"2022-07-01T00:01:14Z","modified":"2023-11-08T04:06:48.213988Z","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"],"updated_at":"2026-11-02T15:46:35.406455Z"}]}}