CVE-2026-73647: medium-severity vulnerability in quasarframework quasar
Quasar Framework: Prototype pollution in Quasar extend() utility
Published
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.6epss 0.4%
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected products
quasarframework · quasarRelated CVEs — quasarframework quasar
In the same product, most dangerous first.
CVE-2026-106104HIGHQuasar Framework: Super-linear regex backtracking on User-Agent lets one request stall a Quasar SSR serverEPSS 0.4%CVE-2026-106102CRITICALQuasar Framework: Stored/Reflected XSS via unescaped SSR meta tag rendering in getHead()EPSS 0.3%CVE-2026-106103HIGHQuasar Framework: Path Traversal / Arbitrary File Write via crafted Icon Genie profileEPSS 0.3%CVE-2026-106106HIGHQuasar Framework: SSR/SSG dev error page discloses the full shell environment and its </script> escape is bypassableEPSS 0.3%CVE-2026-106107HIGHQuasar Framework: App Vite SSR and SSG nonce attributes are not safely constrainedEPSS 0.3%CVE-2026-106101LOWQuasar Framework: DOM Clobbering in Quasar openURL() SafariViewController Integration Causes Client-Side Denial of ServiceEPSS 0.3%