---
id: CVE-2026-55850
title: Element Web is a Matrix web client built using the Matrix React SDK
summary: >-
  Element Web is a Matrix web client built using the Matrix React SDK. Prior to
  1.12.22, EmbeddedPage in apps/web/src/components/structures/EmbeddedPage.tsx
  renders homeserver-supplied homepage content through dangerouslySetInnerHTML
  witho…
severity: none
cwe:
  - CWE-79
published: '2026-08-21'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T19:57:08.043'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55850'
references:
  - url: >-
      https://github.com/element-hq/element-web/commit/7949980a7e3c7e397d7afe899ef1b0563c417b0e
    label: security-advisories@github.com
  - url: 'https://github.com/element-hq/element-web/releases/tag/v1.12.22'
    label: security-advisories@github.com
  - url: >-
      https://github.com/element-hq/element-web/security/advisories/GHSA-wrcp-5v3v-3j6v
    label: security-advisories@github.com
  - url: 'https://www.machinespirits.com/advisory/563a17'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00547
epssPercentile: 0.43733
ingestedAt: '2026-09-30T20:23:19.467Z'
---

## Overview

Element Web is a Matrix web client built using the Matrix React SDK. Prior to 1.12.22, EmbeddedPage in apps/web/src/components/structures/EmbeddedPage.tsx renders homeserver-supplied homepage content through dangerouslySetInnerHTML without passing it through sanitizedHtmlNode. A malicious homeserver can provide crafted HTML that Element Web renders on the homepage; the content security policy prevents JavaScript but not phishing HTML. This issue is fixed in version 1.12.22.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.