{"id":"UBUNTU-CVE-2026-73088","details":"Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7.","modified":"2026-08-19T11:11:14Z","published":"2026-08-11T17:19:00Z","upstream":["CVE-2026-73088"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-73088"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-73088"},{"type":"REPORT","url":"https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"},{"type":"REPORT","url":"https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51"},{"type":"REPORT","url":"https://github.com/browserslist/browserslist/releases/tag/4.28.7"}],"affected":[{"package":{"name":"node-browserslist","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/node-browserslist?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.11.3-1","2.11.3-1build3","2.11.3-1build4"],"ecosystem_specific":{"binaries":[{"binary_version":"2.11.3-1build4","binary_name":"node-browserslist"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73088.json"}},{"package":{"name":"node-browserslist","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-browserslist?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.11.3-1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"node-browserslist","binary_version":"2.11.3-1build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73088.json"}},{"package":{"name":"node-browserslist","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-browserslist?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.16.3+~cs5.4.72-3","4.17.0+~cs5.6.76-1","4.18.1+~cs5.1.2-1","4.19.1+~cs5.1.2-1","4.19.1+repack+~cs5.1.2-2","4.19.3+~cs5.1.3-1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.19.3+~cs5.1.3-1","binary_name":"node-browserslist"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73088.json"}},{"package":{"name":"node-browserslist","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-browserslist?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.21.4+~cs6.1.17-2","4.22.1+~cs6.1.28-1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.22.1+~cs6.1.28-1","binary_name":"node-browserslist"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73088.json"}},{"package":{"name":"node-browserslist","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-browserslist?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.25.2+~cs6.3.22-1","4.26.0+~cs8.11.27-1","4.27.0+~cs8.11.53-2","4.28.1+~cs8.14.48-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-browserslist","binary_version":"4.28.1+~cs8.14.48-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-73088.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}