How severe is GHSA-q42j-x8rq-pjg6?

No CVSS score has been assigned to GHSA-q42j-x8rq-pjg6 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-q42j-x8rq-pjg6?

GHSA-q42j-x8rq-pjg6 affects the following packages: cordova-plugin-inappbrowser (npm). Ecosystems affected: npm.

How do I fix GHSA-q42j-x8rq-pjg6?

Update cordova-plugin-inappbrowser to 6.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q42j-x8rq-pjg6 is resolved across your whole dependency graph.

How do I detect GHSA-q42j-x8rq-pjg6 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cordova-plugin-inappbrowser, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-q42j-x8rq-pjg6 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is GHSA-q42j-x8rq-pjg6 actively exploited in the wild?

No public exploit code has been indexed for GHSA-q42j-x8rq-pjg6 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-q42j-x8rq-pjg6?

GHSA-q42j-x8rq-pjg6 has an EPSS (Exploit Prediction Scoring System) score of 0.8%, placing it in the 54th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-q42j-x8rq-pjg6?

GHSA-q42j-x8rq-pjg6 is classified as Improper Input Validation (CWE-20). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-q42j-x8rq-pjg6 published, and has it been updated?

GHSA-q42j-x8rq-pjg6 was published on June 8, 2026 and was last updated on June 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

GHSA-q42j-x8rq-pjg6 — cordova-plugin-inappbrows…

GHSA-q42j-x8rq-pjg6 is a Improper Input Validation vulnerability in cordova-plugin-inappbrowser. A fix is available for cordova-plugin-inappbrowser — see the affected versions and patch details below.

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

Also known asCVE-2026-47430

Published

Jun 8, 2026

Updated

Jun 12, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 26, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

A successful exploit gives an attacker total control of the affected component, not partial access.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-q42j-x8rq-pjg6.

EPSS Exploitation Probability

via FIRST.org ↗

0.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs54th percentile — riskier than 54% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

45other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

cordova-plugin-inappbrowsernpm

69Kdownloads / week

Description

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.cordova_iab.postMessage({id: '<victim-callback-id>', d: '...'}) to fire callbacks belonging to any other installed Cordova plugin (Camera, Contacts, File, Geolocation). Cordova callback IDs follow the predictable format <PluginName><sequential-integer>, 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

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`cordova-plugin-inappbrowser`	all versions	6.0.1`npm install cordova-plugin-inappbrowser@6.0.1`

Affected Products

1 product · 1 configurations

Application

cordova inappbrowserapache

≥ 3.1.0 && < 6.0.1

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for cordova-plugin-inappbrowser, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update cordova-plugin-inappbrowser to 6.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q42j-x8rq-pjg6 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

## 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

O3 Security · Impact-Aware SCA

Is GHSA-q42j-x8rq-pjg6 in your dependencies?

Find it across npm, including transitive dependencies.

Scan my dependencies How O3 SCA works