{"id":"CVE-2021-23397","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-23397","generatedAt":"2026-10-27T23:27:50.330Z","title":"All versions of package @ianwalter/merge are vulnerable to Prototype Pollution via the main (merge) function.","description":"All versions of package @ianwalter/merge are vulnerable to Prototype Pollution via the main (merge) function. Maintainer suggests using @generates/merger instead.","published":"2022-07-25T14:15:10.000Z","lastModified":"2026-06-17T03:38:41.000Z","status":"Modified","sourceIdentifier":"report@snyk.io","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-1321"],"affected":["merge project/merge"],"epss":{"score":0.00822,"percentile":0.57038,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.82%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://security.snyk.io/vuln/SNYK-JS-IANWALTERMERGE-1311022","tags":["Exploit","Third Party Advisory"],"source":"report@snyk.io"},{"url":"https://security.snyk.io/vuln/SNYK-JS-IANWALTERMERGE-1311022","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-23397","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}