{"id":"CVE-2021-25916","aliases":["EUVD-2021-2176","GHSA-84g3-cv89-m9gm"],"status":"published","title":"Prototype pollution vulnerability in 'patchmerge'","description":"Prototype pollution vulnerability in 'patchmerge' versions 1.0.0 through 1.0.1 allows an 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":"2026-11-09","score":0.03507,"percentile":0.89276,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321"],"published":"2021-03-16T15:07:42Z","modified":"2026-10-20T10:54:33Z","fixes":[{"ecosystem":"npm","package":"patchmerge","fixed_in":["1.0.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"patchmerge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.0.2"}]}]},{"source":"osv","ecosystem":"npm","package":"patchmerge","ranges":[{"type":"SEMVER","events":[{"introduced":"1.0.0"},{"fixed":"1.0.2"}]}]}],"products":[{"vendor":"patchmerge_project","product":"patchmerge"}],"references":[{"url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25916","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://github.com/pjshumphreys/patchmerge/commit/5b383c537eae7a00ebd26d3f7211dac99ddecb12","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-25916","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-84g3-cv89-m9gm"},{"url":"https://github.com/pjshumphreys/patchmerge","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-25916","description":"Prototype pollution vulnerability in 'patchmerge' versions 1.0.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code 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service and may lead to remote code execution.","status":"published","published":"2021-10-13T15:33:20Z","modified":"2023-02-01T05:06:08Z","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":"2026-11-02T14:36:37.441118Z"}],"nvd":[{"id":"CVE-2021-25916","description":"Prototype pollution vulnerability in 'patchmerge' versions 1.0.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-03-16T16:15:14.143Z","modified":"2026-06-17T03:42:34.47Z","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":"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":"secondary"},{"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":"2026-11-02T14:06:50.805771Z"}],"osv":[{"id":"CVE-2021-25916","description":"Prototype pollution vulnerability in 'patchmerge' versions 1.0.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-03-16T16:15:14.143Z","modified":"2026-10-20T10:54:33.832539313Z","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"}],"updated_at":"2026-11-02T15:44:18.778776Z"},{"id":"GHSA-84g3-cv89-m9gm","title":"Prototype pollution vulnerability in 'patchmerge'","description":"Prototype pollution vulnerability in 'patchmerge' versions 1.0.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.","status":"published","published":"2021-10-13T15:33:20Z","modified":"2023-11-08T04:05:17.287008Z","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":"2026-11-02T15:46:41.732368Z"}]}}