# 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.

- **Severity:** Medium 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`)
- **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 available:** No
- **Published:** 19 Oct 2026
- **Updated:** 22 Oct 2026
- **Also known as:** GHSA-54w7-rw44-49m7

## 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 (Improper Input Validation)

## 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.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-55644 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-55644 in the wild and no public exploit code.

Affected product: element-hq element-x-ios. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-55644/ (Markdown: https://insights.sbomify.com/CVE-2026-55644/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-55644
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-55644
- OSV: https://osv.dev/vulnerability/CVE-2026-55644

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-55644/
Summaries are generated and may contain mistakes; the official description above is the record.