Medium severity · published Oct 19, 2026
CVE-2026-55644
Element X iOS: io.element.call deeplink allows attacker-controlled HTTPS origin and may grant mic/camera to that origin
5.1
CVSS
0.4%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
element-x-ios · element-hq
< 26.05.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55644
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55644
github.com
https://github.com/element-hq/element-x-ios/commit/63592e48c1a1e47f75693045efd85a7d4468ea84
github.com
https://github.com/element-hq/element-x-ios/pull/5515
github.com
https://github.com/element-hq/element-x-ios/releases/tag/release/26.05.0
github.com
https://github.com/element-hq/element-x-ios/security/advisories/GHSA-54w7-rw44-49m7
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