{"id":"CVE-2021-25916","aliases":["GHSA-84g3-cv89-m9gm"],"url":"https://o3.security/vulnerability/CVE-2021-25916","summary":"Prototype pollution vulnerability in 'patchmerge'","details":"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.","published":"2021-03-16T16:15:14.143Z","modified":"2026-07-08T05:59:28.414312050Z","cvss":{"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"},"epss":{"score":0.03507,"percentile":0.88307,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"npm","name":"patchmerge","fixedVersion":"1.0.2"}],"fix":{"url":"https://github.com/pjshumphreys/patchmerge/commit/5b383c537eae7a00ebd26d3f7211dac99ddecb12","label":"pjshumphreys/patchmerge@5b383c5"},"references":[{"type":"FIX","url":"https://github.com/pjshumphreys/patchmerge/commit/5b383c537eae7a00ebd26d3f7211dac99ddecb12"},{"type":"EVIDENCE","url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25916"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:59:28.414312050Z"}}