Cordova Plugin InAppBrowser: iOS: Arbitrary Cordova callback IDs can be dispatched without validation from InAppBrowser WebViews.

Exploitation

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

CVSS 4.0

9.5 · CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H · score source

EPSS

• CVE-2026-47430: 0.72% estimated exploitation activity in the next 30 days; percentile 54.08 (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 The iOS implementation of cordova-plugin-inappbrowser passes the id field from a WKScriptMessage body to commandDelegate sendPluginResult:callbackId: with no format validation (CDVWKInAppBrowser.m:560–574). Any web content loaded inside the InAppBrowser can fire any pending Cordova callback in the host app by posting a message whose id field is a guessable or enumerated callback identifier. An attack abusing this weakness must be tailored to the specific plugins and callback IDs the host app uses. Though an attacker with knowledge of common Cordova plugin configurations could craft reusable payloads targeting widely-adopted plugins. Impact An unauthenticated remote attacker who controls content displayed in the InAppBrowser — via a URL the app opens (OAuth redirect, marketing link, deep-link target) or a network interception — can call window.webkit.messageHandlers.cordovaiab.postMessage({id: '<victim-callback-id', d: '...'}) to fire callbacks belonging to any other installed…

Published by the source

8 Jun 2026, 12:30 UTC

Last modified by the source

12 Jun 2026, 21:26 UTC

Source last checked

26 Oct 2026, 12:55 UTC

1. Revision 4 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-q42j-x8rq-pjg6

2. Revision 3 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-q42j-x8rq-pjg6

4. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-q42j-x8rq-pjg6

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# Patch Next advisory brief: CVE-2026-47430

Advisory: Cordova Plugin InAppBrowser: iOS: Arbitrary Cordova callback IDs can be dispatched without validation from InAppBrowser WebViews.
IDs: CVE-2026-47430, GHSA-q42j-x8rq-pjg6
Record: https://patchnext.com/advisories/cve-2026-47430 (revision 4, source checked 26 Oct 2026, 12:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: cordova-plugin-inappbrowser 6.0.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm cordova-plugin-inappbrowser: affected < 6.0.1; fixed in 6.0.1

## Suggested inspection (read-only)
- `npm ls cordova-plugin-inappbrowser --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 cordova-plugin-inappbrowser.
- 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-q42j-x8rq-pjg6 (GitHub-reviewed advisory GHSA-q42j-x8rq-pjg6 lists affected ranges: npm cordova-plugin-inappbrowser >=0 <6.0.1)
- Verified: https://osv.dev/vulnerability/GHSA-q42j-x8rq-pjg6 (OSV record GHSA-q42j-x8rq-pjg6 lists affected ranges: npm cordova-plugin-inappbrowser >=0 <6.0.1 (fixed))

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