{"id":"CVE-2020-8268","aliases":["EUVD-2021-1022","GHSA-8v9x-9xqg-r8mr"],"status":"published","title":"Prototype pollution in json8-merge-patch","description":"Prototype pollution vulnerability in json8-merge-patch npm package \u003c 1.0.3 may allow attackers to inject or modify methods and properties of the global object constructor.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01293,"percentile":0.70502,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321","CWE-20","CWE-471"],"published":"2020-11-09T14:06:21Z","modified":"2026-06-17T03:26:09Z","fixes":[{"ecosystem":"npm","package":"json8-merge-patch","fixed_in":["1.0.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"json8-merge-patch","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3"}]}]},{"source":"osv","ecosystem":"npm","package":"json8-merge-patch","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.0.3"}]}]}],"products":[{"vendor":"json8-merge-patch_project","product":"json8-merge-patch"}],"references":[{"url":"https://hackerone.com/reports/980649","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8268","tags":["advisory"]},{"url":"https://github.com/sonnyp/JSON8/issues/113","tags":["web"]},{"url":"https://github.com/sonnyp/JSON8/commit/2e890261b66cbc54ae01d0c79c71b0fd18379e7e#diff-faa7bef039022bc7ca1c613331b2373950ddd3d65ebf25d1699fbdf89773a387","tags":["web"]},{"url":"https://www.npmjs.com/package/json8-merge-patch","tags":["web"]},{"url":"https://github.com/advisories/GHSA-8v9x-9xqg-r8mr"}],"sources":{"cve":[{"id":"CVE-2020-8268","description":"Prototype pollution vulnerability in json8-merge-patch npm package \u003c 1.0.3 may allow attackers to inject or modify methods and properties of the global object constructor.","status":"published","published":"2020-11-09T14:06:21Z","modified":"2024-08-04T09:56:28.268Z","cwes":["CWE-471"],"updated_at":"2026-11-02T14:35:50.88562Z"}],"euvd":[{"id":"EUVD-2021-1022","description":"Prototype pollution vulnerability in json8-merge-patch npm package \u003c 1.0.3 may allow attackers to inject or modify methods and properties of the global object constructor.","status":"published","published":"2020-11-09T14:06:21Z","modified":"2024-08-04T09:56:28Z","updated_at":"2026-11-03T03:07:57.14802Z"}],"ghsa":[{"id":"GHSA-8v9x-9xqg-r8mr","title":"Prototype pollution in json8-merge-patch","description":"Prototype pollution vulnerability in json8-merge-patch npm package \u003c 1.0.3 may allow attackers to inject or modify methods and properties of the global object constructor.","status":"published","published":"2021-05-10T19:17:15Z","modified":"2023-02-01T05:05:25Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-20","CWE-471","CWE-1321"],"updated_at":"2026-11-02T14:36:34.260786Z"}],"nvd":[{"id":"CVE-2020-8268","description":"Prototype pollution vulnerability in json8-merge-patch npm package \u003c 1.0.3 may allow attackers to inject or modify methods and properties of the global object constructor.","status":"published","published":"2020-11-09T15:15:13.523Z","modified":"2026-06-17T03:26:09.88Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-471","CWE-20"],"updated_at":"2026-11-02T14:06:24.137599Z"}],"osv":[{"id":"GHSA-8v9x-9xqg-r8mr","title":"Prototype pollution in json8-merge-patch","description":"Prototype pollution vulnerability in json8-merge-patch npm package \u003c 1.0.3 may allow attackers to inject or modify methods and properties of the global object constructor.","status":"published","published":"2021-05-10T19:17:15Z","modified":"2023-11-08T04:04:16.264418Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-1321","CWE-20","CWE-471"],"updated_at":"2026-11-02T15:46:42.78452Z"}]}}