medium5.4
CVE-2026-44311
Fabric.js improper escaping in fabric.Gradient colorStops leads to XSS in SVG serialization
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | fabric | < 7.4.0 | 7.4.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Fabricjs | Fabric.Js | before 7.4.0 |