---
id: "CVE-2026-55644"
kind: "vulnerability"
aliases: ["CVE-2026-55644"]
title: "Element X iOS: crafted call URL loads attacker page with camera and microphone"
severity: "medium"
cvss: 5.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["ios", "matrix", "mobile", "package"]
not_affected_if: ["no-camera-or-mic-permission", "patched-version"]
published_at: "2026-10-19T18:17:08+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T04:29:07+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55644", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# Element X iOS: crafted call URL loads attacker page with camera and microphone

Element X iOS before 26.05.0 does not check the URL allowlist when it parses io.element.call:// links. A user who opens a crafted link can have an attacker-controlled page loaded in the call screen, which inherits the microphone and camera permissions already granted to the app.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Element X iOS version in the app's About screen or App Store listing; versions before `26.05.0` are exposed.
- Confirm whether microphone or camera permission has been granted to Element X in iOS Settings.

## Fix

- Update Element X iOS to `26.05.0` or later.
- Revoke camera and microphone permission for Element X in iOS Settings until the update is installed, if the team cannot update right away.

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-55644

## From the sources

Element X iOS is a Matrix iOS Client provided by Element. Element X iOS before version 26.05.0 fails to check the URL allowlist when parsing io.element.call://. If an attacker is able to trick the user into opening a maliciously crafted io.element.call:// URL, they are able to load an attacker-controlled origin inside the call screen's WKWebView which will be granted device microphone and camera permissions (provided the user has previously granted these permissions to Element X iOS). This issue has been patched in version 26.05.0.

---

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