fabricjs fabric.js up to 7.1.x Email Template TextSVGExportMixin.ts escapeXml cross site scripting

Summaryinfo

A vulnerability was found in fabricjs fabric.js up to 7.1.x. It has been declared as problematic. Affected by this issue is the function escapeXml of the file src/shapes/Text/TextSVGExportMixin.ts of the component Email Template Handler. Executing a manipulation can lead to cross site scripting. This vulnerability is handled as CVE-2026-27013. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in fabricjs fabric.js up to 7.1.x. This vulnerability affects the function escapeXml of the file src/shapes/Text/TextSVGExportMixin.ts of the component Email Template Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. CVE summarizes:

Fabric.js is a Javascript HTML5 canvas library. Prior to version 7.2.0, Fabric.js applies `escapeXml()` to text content during SVG export (`src/shapes/Text/TextSVGExportMixin.ts:186`) but fails to apply it to other user-controlled string values that are interpolated into SVG attribute markup. When attacker-controlled JSON is loaded via `loadFromJSON()` and later exported via `toSVG()`, the unescaped values break out of XML attributes and inject arbitrary SVG elements including event handlers. Any application that accepts user-supplied JSON (via `loadFromJSON()`, collaborative sharing, import features, CMS plugins) and renders the `toSVG()` output in a browser context (SVG preview, export download rendered in-page, email template, embed) is vulnerable to stored XSS. An attacker can execute arbitrary JavaScript in the victim's browser session. Version 7.2.0 contains a fix.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-27013 since 02/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 7.2.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 7e1a122defd8feefe4eb7eaf0c180d7b0aeb6fee is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• JavaScript Library

Vendor

• fabricjs

Name

• fabric.js

Version

• 7.0
• 7.1

License

• open-source

Website

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

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