{"id":"CVE-2021-23397","aliases":["EUVD-2022-6222","GHSA-42m6-g935-5vmq"],"status":"published","title":"Prototype Pollution","description":"All versions of package @ianwalter/merge are vulnerable to Prototype Pollution via the main (merge) function. Maintainer suggests using @generates/merger instead.","severity":{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00822,"percentile":0.5757,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321"],"published":"2022-07-25T14:07:41Z","modified":"2026-06-17T03:38:41Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"@ianwalter/merge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"9.0.1"}]}]},{"source":"osv","ecosystem":"npm","package":"@ianwalter/merge","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"9.0.1"}]}]}],"products":[{"vendor":"merge_project","product":"merge"}],"references":[{"url":"https://security.snyk.io/vuln/SNYK-JS-IANWALTERMERGE-1311022","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23397","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-42m6-g935-5vmq"},{"url":"https://github.com/ianwalter/merge","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-23397","title":"Prototype Pollution","description":"All versions of package @ianwalter/merge are vulnerable to Prototype Pollution via the main (merge) function. Maintainer suggests using @generates/merger instead.","status":"published","published":"2022-07-25T14:07:41.094Z","modified":"2024-09-16T19:10:52.652Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:00.819444Z"}],"euvd":[{"id":"EUVD-2022-6222","description":"All versions of package @ianwalter/merge are vulnerable to Prototype Pollution via the main (merge) function. Maintainer suggests using @generates/merger instead.","status":"published","published":"2022-07-25T14:07:41Z","modified":"2024-09-16T19:10:52Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RC:C","level":"medium"}],"updated_at":"2026-11-03T00:55:25.259735Z"}],"ghsa":[{"id":"GHSA-42m6-g935-5vmq","title":"@ianwalter/merge Prototype Pollution via `merge` function","description":"All versions of package @ianwalter/merge are vulnerable to Prototype Pollution via the main (`merge`) function. @ianwalter/merge is [deprecated](https://github.com/ianwalter/merge/blob/master/README.md) and the maintainer suggests using [@generates/merger](https://github.com/generates/generates/tree/main/packages/merger) instead.","status":"published","published":"2022-07-26T00:01:05Z","modified":"2023-01-31T05:01:31Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:36:29.100018Z"}],"nvd":[{"id":"CVE-2021-23397","description":"All versions of package @ianwalter/merge are vulnerable to Prototype Pollution via the main (merge) function. Maintainer suggests using @generates/merger instead.","status":"published","published":"2022-07-25T14:15:10.21Z","modified":"2026-06-17T03:38:41.27Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:07:06.501652Z"}],"osv":[{"id":"GHSA-42m6-g935-5vmq","title":"@ianwalter/merge Prototype Pollution via `merge` function","description":"All versions of package @ianwalter/merge are vulnerable to Prototype Pollution via the main (`merge`) function. @ianwalter/merge is [deprecated](https://github.com/ianwalter/merge/blob/master/README.md) and the maintainer suggests using [@generates/merger](https://github.com/generates/generates/tree/main/packages/merger) instead.","status":"published","published":"2022-07-26T00:01:05Z","modified":"2023-11-08T04:05:07.269444Z","cvss":[{"version":"3.1","score":5.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:36.434231Z"}]}}