CVE-2026-44311: Fabric.js improper escaping in fabric.Gradient colorStops leads to XSS in SVG serialization

June 12, 2026 (updated July 18, 2026)

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 (e.g., via innerHTML), this may allow an attacker to inject arbitrary HTML/SVG and execute JavaScript in the victim’s browser.

References

Code Behaviors & Features

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