Vulnerability in quasar (CVE-2026-106101)
Summary
Vulnerability in quasar (CVE-2026-106101). Risk of unauthorized operations or information disclosure. Exploitable via SafariViewController. Mitigation: upgrade to 2.32.2 or later.
Original description
The description as published by the source.
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 `` 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:
TypeError: window.SafariViewController.isAvailable is not a function
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:
ui/src/utils/open-url/open-url.js
The affected logic is:
if (Platform.is.ios && window.SafariViewController !== void 0) {
window.SafariViewController.isAvailable(available => {
if (available) {
window.SafariViewController.show({ url }, noop, reject)
}
})
}
The issue is that Quasar only verifies that window.SafariViewController is not undefined. It does not verify whether the value is the expected native bridge object o…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-106101 has been found in quasar.
Attackers can target a specific entry point like SafariViewController over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 3.1/10.
What to do: upgrade quasar to 2.32.2 or later.
If unsure, ask your IT team or search "quasar CVE-2026-106101" on the vendor's site.
CVE-2026-106101 (quasar) — CWE-843 / CVSS v3 3.1
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: SafariViewController / window.SafariViewController / undefined / name
Patched: 2.32.2 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-843) exists in quasar. Attackers reach the vulnerable code path via SafariViewController without authentication.
Check the vendor advisory for the affected versions of quasar. Attack surface: SafariViewController / window.SafariViewController / undefined / name.
Severity: Low (CVSS 3.1/10). Risk of unauthorized operations or information disclosure.
Update to 2.32.2.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'quasar' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'quasar' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
quasarを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade quasar to 2.32.2ステージング環境で 2.32.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- web github.com
- web github.com
- web github.com
- web nvd.nist.gov
- web github.com