CVE-2026-55644CWE-20

CVE-2026-55644

published October 19, 2026

CVSS
5.1
EPSS
0%
Percentile
22.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
5.1 · NONE
CVSS v4.0
5.1 · 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
EPSS
0.00304 · 22.0th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2026-10-19T22:17Z
References (4)
https://github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84 · [email protected]https://github.com/element-hq/element-x-ios/pull/5515 · [email protected]https://github.com/element-hq/element-x-ios/releases/tag/release/26.05.0 · [email protected]https://github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7 · [email protected]
EPSS history
Timeline
  • 21 OCT 03:30Z
    EPSS moved — → 0%
    epss
  • 19 OCT 17:54Z
    Element X iOS: io.element.call deeplink allows attacker-controlled HTTPS origin and may grant mic/camera to that origin
    cvelistv5
  • 19 OCT 17:54Z
    Element X iOS: io.element.call deeplink allows attacker-controlled HTTPS origin and may grant mic/camera to that origin
    cvelistv5