{"id":"CVE-2023-26135","aliases":["EUVD-2023-1736","GHSA-7px2-3c2p-q4v4"],"status":"published","title":"flatnest Prototype Pollution vulnerability","description":"All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00892,"percentile":0.59737,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1321"],"published":"2023-06-30T05:00:01Z","modified":"2026-10-28T02:30:34Z","affected":[{"source":"ghsa","ecosystem":"npm","package":"flatnest","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.0.0"}]}]},{"source":"osv","ecosystem":"npm","package":"flatnest","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"1.0.0"}]}]}],"products":[{"vendor":"flatnest_project","product":"flatnest"}],"references":[{"url":"https://security.snyk.io/vuln/SNYK-JS-FLATNEST-3185149","tags":["x_transferred","Exploit","Third Party Advisory","web"]},{"url":"https://github.com/brycebaril/node-flatnest/issues/4","tags":["x_transferred","Exploit","Issue Tracking","report","web"]},{"url":"https://github.com/brycebaril/node-flatnest/blob/b7d97ec64a04632378db87fcf3577bd51ac3ee39/nest.js%23L43","tags":["x_transferred","Broken Link","web"]},{"url":"https://github.com/brycebaril/node-flatnest/commit/27d569baf9d9d25677640edeaf2d13af165868d6","tags":["x_transferred","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26135","tags":["advisory"]},{"url":"https://github.com/brycebaril/node-flatnest/blob/b7d97ec64a04632378db87fcf3577bd51ac3ee39/nest.js#L43","tags":["web"]},{"url":"https://github.com/advisories/GHSA-7px2-3c2p-q4v4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26135.json","tags":["advisory"]},{"url":"https://github.com/brycebaril/node-flatnest","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-26135","description":"All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.","status":"published","published":"2023-06-30T05:00:01.815Z","modified":"2024-08-02T11:39:06.648Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","level":"high","assessor":"cna"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:35:15.434947Z"}],"euvd":[{"id":"EUVD-2023-1736","description":"All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.","status":"published","published":"2023-06-30T05:00:01Z","modified":"2024-08-02T11:39:06Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","level":"high"}],"updated_at":"2026-11-03T03:50:06.766939Z"}],"ghsa":[{"id":"GHSA-7px2-3c2p-q4v4","title":"flatnest Prototype Pollution vulnerability","description":"All versions of the package flatnest are vulnerable to Prototype Pollution via the `nest()` function in `flatnest/nest.js` file.","status":"published","published":"2023-06-30T06:30:14Z","modified":"2024-02-07T18:31:04Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:37:36.076201Z"}],"nvd":[{"id":"CVE-2023-26135","description":"All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.","status":"published","published":"2023-06-30T05:15:09.223Z","modified":"2026-06-17T05:42:45.36Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"secondary"},{"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"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:08:14.715708Z"}],"osv":[{"id":"CVE-2023-26135","description":"All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.","status":"published","published":"2023-06-30T05:00:01.815Z","modified":"2026-10-28T02:30:34.693920136Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:44:31.135751Z"},{"id":"GHSA-7px2-3c2p-q4v4","title":"flatnest Prototype Pollution vulnerability","description":"All versions of the package flatnest are vulnerable to Prototype Pollution via the `nest()` function in `flatnest/nest.js` file.","status":"published","published":"2023-06-30T06:30:14Z","modified":"2023-11-08T04:11:59.497488Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:41.349637Z"}]}}