fabricjs fabric.js up to 7.3.x toSVG Color cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in fabricjs fabric.js up to 7.3.x. Affected is the function toSVG. The manipulation of the argument Color leads to cross site scripting. This vulnerability is listed as CVE-2026-44311. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in fabricjs fabric.js up to 7.3.x. It has been rated as problematic. This issue affects the function toSVG. The manipulation of the argument color with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

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 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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-44311 since 05/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 7.4.0 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• JavaScript Library

Vendor

• fabricjs

Name

• fabric.js

Version

• 7.0
• 7.1
• 7.2
• 7.3

Website

• Product: https://github.com/fabricjs/fabric.js/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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