---
title: "CVE-2026-47430: Cordova Plugin InAppBrowser: iOS: Arbitrary Cordova callback IDs can be dispatched without validation from InAppBrowser WebViews."
url: https://erroneo.us/security/cve/CVE-2026-47430/
description: "CVE-2026-47430 (cordova-plugin-inappbrowser (npm)): Summary The iOS implementation of cordova-plugin-inappbrowser passes the id field from a WKScriptMessage…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-08
date_modified: 2026-06-12
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-47430"
kev: false
cvss: 9.5
epss: 0.00774
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-47430: Cordova Plugin InAppBrowser: iOS: Arbitrary Cordova callback IDs can be dispatched without validation from InAppBrowser WebViews.

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.8% , percentile 55: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 55% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes cordova-plugin-inappbrowser (npm) < 6.0.1, fixed in 6.0.1 . Check your lockfile, including transitive dependencies.

## What it is

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: ' ', d: '...'}) to fire callbacks belonging to any other installed Cordova plugin (Camera, Contacts, File, Geolocation). Cordova callback IDs follow the predictable format , making enumeration feasible. Successful exploitation allows the attacker to spoof plugin results across trust boundaries — for example, injecting a forged camera approval, a fabricated contacts list, or a crafted file-read response. This issue affects Cordova Plugin InAppBrowser: from 3.1.0 through 6.0.0. Users are recommended to upgrade to version 6.0.1, which fixes the issue.

## Affected packages

- npm `cordova-plugin-inappbrowser` < 6.0.1 → fixed: 6.0.1

## Affected products (CVE record)

- Apache Software Foundation Cordova Plugin InAppBrowser: 3.1.0 <= 6.0.0

## Severity

- apache 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`
- GitHub 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`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.77% probability of exploitation activity in the next 30 days; percentile 55.

## Sources

- [lists.apache.org](https://lists.apache.org/thread/sb539nss3b0545wnyt1pbh7zgwjvz2qq)
- [GitHub Advisory GHSA-q42j-x8rq-pjg6](https://github.com/advisories/GHSA-q42j-x8rq-pjg6)
- [CVE.org record CVE-2026-47430](https://www.cve.org/CVERecord?id=CVE-2026-47430)
- [NVD entry CVE-2026-47430](https://nvd.nist.gov/vuln/detail/CVE-2026-47430)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/06/07/1)

---
Source page: https://erroneo.us/security/cve/CVE-2026-47430/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt