Is CVE-2026-120350 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-120350 being exploited in the wild.

How severe is CVE-2026-120350?

Informational severity, published 10 November 2026.

Which products and versions are affected?

Vaadin Rich Text Editor 25.0.0 to 25.3.4.

Is there a fix for CVE-2026-120350?

Yes: fixed in Vaadin 25.2.13, 25.3.5 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-120350 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-120350?

Check whether you run Vaadin Rich Text Editor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-120350: Vaadin Rich Text Editor stored XSS via video embed

CVE-2026-120350 · Severity: info · Published 2026-11-10

Vaadin Rich Text Editor, a component used to build rich text editing functionality into web applications, contains a vulnerability where video embeds are not properly escaped before being parsed into the page DOM. An attacker who can edit shared content can inject malicious code into a video embed that executes in the browsers of all users who view the page, including in read-only mode, leading to account compromise or data theft.

Vendors: Vaadin.

Quick answers

Is CVE-2026-120350 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-120350 being exploited in the wild.
How severe is CVE-2026-120350?: Informational severity, published 10 November 2026.
Which products and versions are affected?: Vaadin Rich Text Editor 25.0.0 to 25.3.4.
Is there a fix for CVE-2026-120350?: Yes: fixed in Vaadin 25.2.13, 25.3.5 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-120350 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-120350?: Check whether you run Vaadin Rich Text Editor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Vaadin 25.2.13, 25.3.5 and later

Technical details

The vulnerability exists in how Rich Text Editor exports video embeds via asDelta(): the href attribute value is not escaped before the HTML is parsed into live DOM, allowing attribute breakout to inject arbitrary JavaScript. The vulnerability only affects content persisted through asDelta(); the default HTML path using setValue/getValue is protected by server-side sanitization. Vaadin 24 and earlier are unaffected as they escape via browser mechanisms.

Affected products

Vaadin Rich Text Editor 25.0.0 to 25.3.4

Timeline

2026-11-10: disclosed

References

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