---
id: CVE-2026-55644
title: >-
  Element X iOS: io.element.call deeplink allows attacker-controlled HTTPS
  origin and may grant mic/camera to that origin
summary: >-
  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 …
severity: medium
cvss: 5.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-20
vendor: element-hq
product: element-x-ios
affected:
  - element-x-ios < 26.05.0
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T17:54:58.499Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-55644'
references:
  - url: >-
      https://github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7
    label: >-
      https://github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7
  - url: 'https://github.com/element-hq/element-x-ios/pull/5515'
    label: 'https://github.com/element-hq/element-x-ios/pull/5515'
  - url: >-
      https://github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84
    label: >-
      https://github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84
  - url: 'https://github.com/element-hq/element-x-ios/releases/tag/release/26.05.0'
    label: 'https://github.com/element-hq/element-x-ios/releases/tag/release/26.05.0'
tags:
  - cve.org
ingestedAt: '2026-10-19T18:35:50.156Z'
---

## Overview

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.

## Affected

- `element-x-ios < 26.05.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.