# CVE-2026-47430: Apache Cordova InAppBrowser improper input validation in iOS callback handler

Source: https://junglewise.ai/threats/cve-2026-47430-apache-cordova-inappbrowser-improper-input-validation-in-ios  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-08. Updated: 2026-06-12  
License: CC BY 4.0 with a link back

CVE-2026-47430 · Severity: critical · CVSS 4 · Published 2026-06-08

A vulnerability in the iOS version of the Cordova InAppBrowser plugin allows malicious websites loaded within the browser to interfere with the main mobile application. By guessing internal communication IDs, an attacker can trigger actions in other installed plugins, such as the camera, contacts, or file system. This could lead to unauthorized data access or the injection of fraudulent information into the app.

Vendors: [Apache Software Foundation](https://junglewise.ai/threats/vendors/apache-software-foundation), [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2026-47430 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47430 being exploited in the wild.

**How severe is CVE-2026-47430?** Critical severity, with a CVSS score of 4, published 8 June 2026.

**Which products and versions are affected?** Apache Software Foundation InAppBrowser plugin >= 3.1.0, < 6.0.1, 3.1.0 through 6.0.0; cordova-plugin-inappbrowser (npm) < 6.0.1, SEMVER:introduced=0,fixed=6.0.1.

**Is there a fix for CVE-2026-47430?** Yes. cordova-plugin-inappbrowser (npm): upgrade to 6.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-47430 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-47430?** Check whether you run Apache Software Foundation InAppBrowser plugin or cordova-plugin-inappbrowser (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- cordova-plugin-inappbrowser (npm): upgrade to 6.0.1 or later

  ```sh
  npm install cordova-plugin-inappbrowser@6.0.1
  ```


## Technical details

The iOS implementation of cordova-plugin-inappbrowser lacks format validation for the 'id' field in WKScriptMessage bodies passed to 'commandDelegate sendPluginResult:callbackId:'. Because Cordova callback IDs follow a predictable '<PluginName><sequential-integer>' format, an unauthenticated remote attacker controlling content within the InAppBrowser can enumerate and fire pending callbacks for other plugins (e.g., Camera, Contacts, File). This allows for the injection of forged plugin results across trust boundaries. The vulnerability is fixed in version 6.0.1.

## Affected products

- Apache cordova-plugin-inappbrowser >= 3.1.0, < 6.0.1

## Identifiers

- CVE-2026-47430
- GHSA-q42j-x8rq-pjg6

## Timeline

- 2026-06-08: advisory: Initial disclosure and NVD publication
- 2026-06-12: other: GitHub Advisory reviewed and updated

## References

- [https://api.github.com/users/NiklasMerz](https://api.github.com/users/NiklasMerz)
- [https://github.com/NiklasMerz](https://github.com/NiklasMerz)
- [https://api.github.com/users/NiklasMerz/gists%7B/gist_id%7D](https://api.github.com/users/NiklasMerz/gists%7B/gist_id%7D)
- [https://api.github.com/users/NiklasMerz/repos](https://api.github.com/users/NiklasMerz/repos)
- [https://avatars.githubusercontent.com/u/3585860?v=4](https://avatars.githubusercontent.com/u/3585860?v=4)
- [https://api.github.com/users/NiklasMerz/events%7B/privacy%7D](https://api.github.com/users/NiklasMerz/events%7B/privacy%7D)

## Related threats

- [Apache cordova-plugin-inappbrowser privilege escalation on Android](https://junglewise.ai/threats/cve-2019-0219-apache-cordova-plugin-inappbrowser-privilege-escalation-on-android)