CVE-2026-55644 Element X iOS: io.element.call deeplink allows attacker-controlled HTTPS origin and may grant mic/camera to that origin
Attackers can bypass URL allowlists to load malicious origins in the call screen, potentially accessing microphone and camera permissions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-55644?
CVE-2026-55644 is a medium-severity vulnerability in element-hq element-x-ios, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2026-55644?
How do I fix CVE-2026-55644?
No fix has been published for CVE-2026-55644 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-55644 being exploited?
There is no known exploitation of CVE-2026-55644 in the wild and no public exploit code.
Sources
Also known as GHSA-54w7-rw44-49m7.