# Element Web vulnerabilities

Source: https://junglewise.ai/threats/technologies/element-web  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 10 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/element-web.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Element Web: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-119407, was published on 30 October 2026. 1 vulnerability in the last four weeks, up from none in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 1
- Last 90 days: 2
- All time: 3 (0 critical, 0 exploited in the wild)

## About Element Web

Web-based client for Matrix protocol messaging and collaboration platform.

## Latest Element Web vulnerabilities

- [CVE-2026-119407: Element Web and Element Desktop URL fragment credential injection](https://junglewise.ai/threats/cve-2026-119407-element-web-and-element-desktop-before-1-12-32-accept-guest) (high, CVSS 7.1, published 30 Oct 2026)
- [CVE-2026-55850: Element Web cross-site scripting in embedded page](https://junglewise.ai/threats/cve-2026-55850-element-web-cross-site-scripting-in-embedded-page) (info, CVSS 0, published 21 Aug 2026)
- [CVE-2021-40823: Matrix matrix-js-sdk E2EE room key disclosure to homeservers](https://junglewise.ai/threats/cve-2021-40823-matrix-matrix-js-sdk-e2ee-room-key-disclosure-to-homeservers) (low, CVSS 3.1, published 14 Sep 2021)

## Most severe Element Web vulnerabilities

- [CVE-2026-119407: Element Web and Element Desktop URL fragment credential injection](https://junglewise.ai/threats/cve-2026-119407-element-web-and-element-desktop-before-1-12-32-accept-guest) (high, CVSS 7.1, published 30 Oct 2026)
- [CVE-2021-40823: Matrix matrix-js-sdk E2EE room key disclosure to homeservers](https://junglewise.ai/threats/cve-2021-40823-matrix-matrix-js-sdk-e2ee-room-key-disclosure-to-homeservers) (low, CVSS 3.1, published 14 Sep 2021)
- [CVE-2026-55850: Element Web cross-site scripting in embedded page](https://junglewise.ai/threats/cve-2026-55850-element-web-cross-site-scripting-in-embedded-page) (info, CVSS 0, published 21 Aug 2026)

## Vulnerabilities per week

1 vulnerability in the last four weeks, up from none in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 1 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 1 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Element technologies

- [Element Synapse](https://junglewise.ai/threats/technologies/synapse): 4 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Element Web vulnerabilities", https://junglewise.ai/threats/technologies/element-web, 10 November 2026.