{"id":"CVE-2026-73647","title":"Quasar Framework is a framework for building high-performance Vue.js user interfaces","summary":"Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.22.0, the public extend() utility in ui/src/utils/extend/extend.js recursively copied attacker-controlled object keys during extend(true, ta…","severity":"medium","cvss":5.6,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-1321"],"published":"2026-08-13","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:02:22.660","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73647","references":[{"url":"https://github.com/quasarframework/quasar/commit/d0a95d95ab3c29d13e1b8ba8c5e5025fd6ce35e7","label":"security-advisories@github.com"},{"url":"https://github.com/quasarframework/quasar/releases/tag/quasar-v2.22.0","label":"security-advisories@github.com"},{"url":"https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j","label":"security-advisories@github.com"},{"url":"https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.0038,"epssPercentile":0.31788,"ingestedAt":"2026-09-09T21:22:45.534Z","slug":"CVE-2026-73647","body":"## Overview\n\nQuasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.22.0, the public extend() utility in ui/src/utils/extend/extend.js recursively copied attacker-controlled object keys during extend(true, target, source) deep merges without rejecting an own __proto__ property. The merge could descend into the prototype object and write attacker-controlled properties to Object.prototype in the same JavaScript process. Applications that passed user-controlled or partially user-controlled objects to extend() could experience logic bypass, unsafe default-option injection, denial of service, or other application-specific impact when polluted properties were later consumed. This issue is fixed in version 2.22.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":31,"depthScoreParts":{"impact":30.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}