{"id":"CVE-2021-23702","aliases":["EUVD-2022-1091","GHSA-m639-9whg-fw97"],"status":"published","title":"Prototype Pollution","description":"The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.","severity":{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/E:P","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01378,"percentile":0.72451,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321"],"published":"2022-02-18T20:00:13Z","modified":"2026-06-17T03:38:51Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"object-extend","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.5.0"}]}]},{"source":"osv","ecosystem":"npm","package":"object-extend","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.5.0"}]}]}],"products":[{"vendor":"object-extend_project","product":"object-extend"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-OBJECTEXTEND-2401470","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23702","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m639-9whg-fw97"},{"url":"https://github.com/bernhardw/object-extend","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-23702","title":"Prototype Pollution","description":"The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.","status":"published","published":"2022-02-18T20:00:13.292Z","modified":"2024-09-17T03:37:50.558Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/E:P","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.819444Z"}],"euvd":[{"id":"EUVD-2022-1091","description":"The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.","status":"published","published":"2022-02-18T20:00:13Z","modified":"2024-09-17T03:37:50Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/E:P","level":"high"}],"updated_at":"2026-11-03T00:28:30.275492Z"}],"ghsa":[{"id":"GHSA-m639-9whg-fw97","title":"Prototype Pollution in object-extend","description":"The package object-extend from 0.0.0 through 0.5.0 is vulnerable to Prototype Pollution via object-extend.","status":"published","published":"2022-02-19T00:01:25Z","modified":"2023-02-03T05:06:22Z","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":"2026-11-02T14:36:43.439065Z"}],"nvd":[{"id":"CVE-2021-23702","description":"The package object-extend from 0.0.0 are vulnerable to Prototype Pollution via object-extend.","status":"published","published":"2022-02-18T20:15:10.943Z","modified":"2026-06-17T03:38:51.91Z","cvss":[{"version":"3.1","score":7.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L","level":"high","assessor":"secondary"},{"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":"2026-11-02T14:07:04.6896Z"}],"osv":[{"id":"GHSA-m639-9whg-fw97","title":"Prototype Pollution in object-extend","description":"The package object-extend from 0.0.0 through 0.5.0 is vulnerable to Prototype Pollution via object-extend.","status":"published","published":"2022-02-19T00:01:25Z","modified":"2026-03-14T01:41:21.73161Z","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":"2026-11-02T15:46:51.463834Z"}]}}