{"id":"CVE-2021-25953","aliases":["EUVD-2021-2500","GHSA-9x7m-9hpg-xxmw"],"status":"published","title":"Prototype Pollution in putil-merge","description":"Prototype pollution vulnerability in 'putil-merge' versions1.0.0 through 3.6.6 allows attacker to cause a denial of service and may lead to remote code execution.","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":"2026-11-12","score":0.02961,"percentile":0.87404,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321"],"published":"2021-07-14T10:34:46Z","modified":"2026-06-17T03:42:40Z","fixes":[{"ecosystem":"npm","package":"putil-merge","fixed_in":["3.7.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"putil-merge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"last_affected":"3.6.6"},{"fixed":"3.7.0"}]}]},{"source":"osv","ecosystem":"npm","package":"putil-merge","ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"3.7.0"}]}]}],"products":[{"vendor":"putil-merge_project","product":"putil-merge"}],"references":[{"url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25953","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25953","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-9x7m-9hpg-xxmw"}],"sources":{"cve":[{"id":"CVE-2021-25953","description":"Prototype pollution vulnerability in 'putil-merge' versions1.0.0 through 3.6.6 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-07-14T10:34:46Z","modified":"2024-08-03T20:19:18.976Z","updated_at":"2026-11-02T14:32:59.430294Z"}],"euvd":[{"id":"EUVD-2021-2500","description":"Prototype pollution vulnerability in 'putil-merge' versions1.0.0 through 3.6.6 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-07-14T10:34:46Z","modified":"2024-08-03T20:19:18Z","updated_at":"2026-11-03T03:24:51.962182Z"}],"ghsa":[{"id":"GHSA-9x7m-9hpg-xxmw","title":"Prototype Pollution in putil-merge","description":"Prototype pollution vulnerability in 'putil-merge' versions1.0.0 through 3.6.6 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-12-10T17:24:16Z","modified":"2023-02-01T05:06:00Z","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":"2026-11-02T14:36:36.66596Z"}],"nvd":[{"id":"CVE-2021-25953","description":"Prototype pollution vulnerability in 'putil-merge' versions1.0.0 through 3.6.6 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-07-14T11:15:07.82Z","modified":"2026-06-17T03:42:40.043Z","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":"2026-11-02T14:06:55.747384Z"}],"osv":[{"id":"GHSA-9x7m-9hpg-xxmw","title":"Prototype Pollution in putil-merge","description":"Prototype pollution vulnerability in 'putil-merge' versions1.0.0 through 3.6.6 allows attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-12-10T17:24:16Z","modified":"2023-11-08T04:05:18.445998Z","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":"2026-11-02T15:46:44.225359Z"}]}}