Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Fabricjs | Fabric.Js | < 7.2.0 |
Related Weaknesses (CWE)
References
- https://github.com/fabricjs/fabric.js/commit/7e1a122defd8feefe4eb7eaf0c180d7b0aePatch
- https://github.com/fabricjs/fabric.js/releases/tag/v720ProductRelease Notes
- https://github.com/fabricjs/fabric.js/security/advisories/GHSA-hfvx-25r5-qc3wExploitPatchVendor Advisory
FAQ
What is CVE-2026-27013?
CVE-2026-27013 is a vulnerability with a CVSS score of 7.6 (HIGH). 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 app...
How severe is CVE-2026-27013?
CVE-2026-27013 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27013?
Check the references section above for vendor advisories and patch information. Affected products include: Fabricjs Fabric.Js.