CVE-2026-44311 Fabric.js: Improper escaping in fabric.Gradient colorStops leads to XSS in SVG serialization
Attackers can inject malicious scripts via unescaped gradient colors in SVG output, leading to XSS if the SVG is rendered in the browser.
- 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
What is CVE-2026-44311?
CVE-2026-44311 is a medium-severity cross-site scripting vulnerability in fabricjs fabric.js, published on 22 Jun 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
Fabric.js is a Javascript HTML5 canvas library. Prior to 7.4.0, a potential Cross-Site Scripting (XSS) vulnerability exists in Fabric.js due to improper escaping of user-controlled input during SVG serialization via the toSVG() method. Specifically, the color field within the colorStops array of a fabric.Gradient object is not properly escaped when converted into SVG <stop> elements. If an application renders the generated SVG string into the DOM, this may allow an attacker to inject arbitrary HTML/SVG and execute JavaScript in the victim's browser. This vulnerability is fixed in 7.4.0.
Which versions are affected by CVE-2026-44311?
2 open source packages ship an affected version, including fabric. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
fabric npm | All versions | 7.4.0 |
fabric npm | All versions | 7.4.0 |
Products include Fabricjs Fabric.js.
How do I fix CVE-2026-44311?
Upgrade fabric to 7.4.0 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-44311 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44311 exists.
Other vulnerabilities in fabricjs fabric.js
Sources
Also known as GHSA-w22m-hvvm-xmwx.