What’s Vulnerable › Vulnerabilities

CVE-2026-55644: Element X iOS: io.element.call deeplink allows attacker-controlled HTTPS origin and may grant mic/camera to that origin

• Severity: medium (CVSS 5.1 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-19 · updated 2026-10-22
• Weakness: CWE-20

Description

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 products

• element-hq element-x-ios: before 26.05.0

References

• https://github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84
• https://github.com/element-hq/element-x-ios/pull/5515
• https://github.com/element-hq/element-x-ios/releases/tag/release/26.05.0
• https://github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7

Get alerted when CVE-2026-55644 or the next vulnerability affects your stack