ionic-team Capacitor up to 6.2.1/7.6.8/8.5.0 WebView Navigation Guard cross-domain policy

Summaryinfo

A vulnerability, which was classified as problematic, has been found in ionic-team Capacitor up to 6.2.1/7.6.8/8.5.0. Affected is an unknown function of the component WebView Navigation Guard. The manipulation leads to cross-domain policy. This vulnerability is listed as CVE-2026-103922. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ionic-team Capacitor up to 6.2.1/7.6.8/8.5.0 and classified as problematic. This issue affects an unknown functionality of the component WebView Navigation Guard. The manipulation with an unknown input leads to a cross-domain policy vulnerability. Using CWE to declare the problem leads to CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. Impacted is confidentiality. The summary by CVE is:

Capacitor is a cross-platform native runtime for web applications. From 6.0.0 until 6.2.2, 7.6.9, 8.3.5, 8.4.3, and 8.5.1, the Android and iOS WebView navigation guard validates a target URL's host and scheme but not its path, allowing a victim who activates an untrusted link to navigate a frame to /_capacitor_http_interceptor_. The native proxy can fetch an attacker-selected URL and return the response as a document at the application's own origin, allowing script in that response to access same-origin storage, cookies, and registered Capacitor plugin capabilities. Applications remain affected when CapacitorHttp is disabled because affected releases serve the proxy path regardless of that setting. This issue is fixed in versions 6.2.2, 7.6.9, 8.3.5, 8.4.3, and 8.5.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-103922 since 10/01/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 6.2.2, 7.6.9, 8.3.5, 8.4.3 or 8.5.1 eliminates this vulnerability.

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Productinfo

Vendor

• ionic-team

Name

• Capacitor

Version

• 6.2.0
• 6.2.1
• 7.6.0
• 7.6.1
• 7.6.2
• 7.6.3
• 7.6.4
• 7.6.5
• 7.6.6
• 7.6.7
• 7.6.8
• 8.0
• 8.1
• 8.2
• 8.3
• 8.4
• 8.5.0

Website

• Product: https://github.com/ionic-team/capacitor/

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