Vulnerability Description
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, 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/quasarframework/quasar/commit/d0a95d95ab3c29d13e1b8ba8c5e5025
- https://github.com/quasarframework/quasar/releases/tag/quasar-v2.22.0
- https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7
- https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7
FAQ
What is CVE-2026-73647?
CVE-2026-73647 is a vulnerability with a CVSS score of 5.6 (MEDIUM). 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-controll...
How severe is CVE-2026-73647?
CVE-2026-73647 has been rated MEDIUM with a CVSS base score of 5.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-73647?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.