{"id":"CVE-2021-23700","aliases":["EUVD-2021-2536","GHSA-j28q-p8ww-cp87"],"status":"published","title":"Prototype Pollution","description":"All versions of package merge-deep2 are vulnerable to Prototype Pollution via the mergeDeep() function.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0121,"percentile":0.68693,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321"],"published":"2021-12-10T20:05:22Z","modified":"2026-06-17T03:38:51Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"merge-deep2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.0.6"}]}]},{"source":"osv","ecosystem":"npm","package":"merge-deep2","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"3.0.6"}]}]}],"products":[{"vendor":"merge-deep2_project","product":"merge-deep2"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-MERGEDEEP2-1727593","tags":["x_refsource_MISC","x_transferred","Exploit","Mitigation","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23700","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-j28q-p8ww-cp87"},{"url":"https://github.com/luyuan/merge-deep","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-23700","title":"Prototype Pollution","description":"All versions of package merge-deep2 are vulnerable to Prototype Pollution via the mergeDeep() function.","status":"published","published":"2021-12-10T20:05:22.255Z","modified":"2024-09-16T21:09:04.413Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.488332Z"}],"euvd":[{"id":"EUVD-2021-2536","description":"All versions of package merge-deep2 are vulnerable to Prototype Pollution via the mergeDeep() function.","status":"published","published":"2021-12-10T20:05:22Z","modified":"2024-09-16T21:09:04Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P","level":"medium"}],"updated_at":"2026-11-03T00:55:07.646084Z"}],"ghsa":[{"id":"GHSA-j28q-p8ww-cp87","title":"Prototype Pollution in merge-deep2.","description":"All versions of package merge-deep2 are vulnerable to Prototype Pollution via the mergeDeep() function.","status":"published","published":"2021-12-16T14:33:09Z","modified":"2023-02-01T05:07:03Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:36:39.76883Z"}],"nvd":[{"id":"CVE-2021-23700","description":"All versions of package merge-deep2 are vulnerable to Prototype Pollution via the mergeDeep() function.","status":"published","published":"2021-12-10T20:15:08.527Z","modified":"2026-06-17T03:38:51.803Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium","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":"2026-11-02T14:07:02.189991Z"}],"osv":[{"id":"GHSA-j28q-p8ww-cp87","title":"Prototype Pollution in merge-deep2.","description":"All versions of package merge-deep2 are vulnerable to Prototype Pollution via the mergeDeep() function.","status":"published","published":"2021-12-16T14:33:09Z","modified":"2023-11-08T04:05:12.687434Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:49.621585Z"}]}}