{"id":"CVE-2020-7751","aliases":["DEBIAN-CVE-2020-7751","EUVD-2022-1001","GHSA-g6ww-v8xp-vmwg","SNYK-JS-PATHVAL-596926","UBUNTU-CVE-2020-7751"],"status":"published","title":"Prototype Pollution","description":"pathval before version 1.1.1 is vulnerable to prototype pollution.","severity":{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01516,"percentile":0.74742,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-20"],"published":"2020-10-25T15:55:14Z","modified":"2026-10-26T12:02:45Z","fixes":[{"ecosystem":"npm","package":"pathval","fixed_in":["1.1.1"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"node-pathval","fixed_in":["1.1.0-4"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"node-pathval","fixed_in":["1.1.0-4"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"node-pathval","fixed_in":["1.1.0-4"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"pathval","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.1"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"node-pathval","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0-4"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"node-pathval","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0-4"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"node-pathval","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.0-4"}]}]},{"source":"osv","ecosystem":"npm","package":"pathval","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.1.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"node-pathval","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"node-pathval","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0-3"]}],"products":[{"vendor":"chaijis","product":"pathval"}],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-PATHVAL-596926","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Third Party Advisory","fix","web","report"]},{"url":"https://github.com/chaijs/pathval/pull/58/files","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7751","tags":["advisory"]},{"url":"https://github.com/chaijs/pathval/pull/58/commits/21a9046cfa0c2697cb41990f3b4316db410e6c8a","tags":["web"]},{"url":"https://github.com/chaijs/pathval/releases/tag/v1.1.1","tags":["web"]},{"url":"https://github.com/advisories/GHSA-g6ww-v8xp-vmwg"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-7751","tags":["advisory"]},{"url":"https://github.com/chaijs/pathval","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2020-7751","tags":["report"]},{"url":"https://github.com/chaijs/pathval/pull/58","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-7751","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-7751","title":"Prototype Pollution","description":"pathval before version 1.1.1 is 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