Quasar Framework: DOM Clobbering in Quasar openURL() SafariViewController Integration Causes Client-Side Denial of Service

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

3.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS

• CVE-2026-106101: 0.26% estimated exploitation activity in the next 30 days; percentile 17.27 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary A DOM Clobbering vulnerability exists in Quasar's openURL() utility when handling the iOS SafariViewController bridge. The vulnerable implementation only checks whether window.SafariViewController exists before invoking it as a native bridge object. An attacker who can inject HTML content containing a named element such as <a id="SafariViewController" can cause the browser to expose that element as window.SafariViewController. When openURL() is later called in an iOS environment, Quasar incorrectly treats the DOM element as the native bridge object and attempts to invoke bridge methods that do not exist, resulting in: This can cause client-side denial of service and break navigation-related workflows in Quasar applications. Details Quasar provides the openURL() utility to open external URLs. On iOS platforms, this utility supports integration with the native SafariViewController bridge. The vulnerable code is located in: The affected logic is: The issue is that Quasar only…

Published by the source

7 Oct 2026, 20:23 UTC

Last modified by the source

7 Oct 2026, 20:30 UTC

Source last checked

26 Oct 2026, 13:07 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-89vp-x45c-52cq

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-89vp-x45c-52cq

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-89vp-x45c-52cq

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# Patch Next advisory brief: CVE-2026-106101

Advisory: Quasar Framework: DOM Clobbering in Quasar openURL() SafariViewController Integration Causes Client-Side Denial of Service
IDs: CVE-2026-106101, GHSA-89vp-x45c-52cq
Record: https://patchnext.com/advisories/cve-2026-106101 (revision 3, source checked 26 Oct 2026, 13:07 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: quasar 2.32.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm quasar: affected <= 2.32.1; fixed in 2.32.2

## Suggested inspection (read-only)
- `npm ls quasar --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on quasar.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-89vp-x45c-52cq (GitHub-reviewed advisory GHSA-89vp-x45c-52cq lists affected ranges: npm quasar >=0 <=2.32.1)
- Verified: https://osv.dev/vulnerability/GHSA-89vp-x45c-52cq (OSV record GHSA-89vp-x45c-52cq lists affected ranges: npm quasar >=0 <2.32.2 (fixed))

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