CVE-2026-27013
HIGH
GHSA-hfvx-25r5-qc3w
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L
Lifecycle Timeline
4Description
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.
Analysis
Stored XSS in Fabric.js prior to version 7.2.0 allows attackers to inject arbitrary SVG elements and event handlers when user-supplied JSON is loaded and exported via toSVG(), affecting applications that process collaborative designs, imports, or CMS plugins. Public exploit code exists for this vulnerability. …
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Remediation
Within 24 hours: Inventory all applications and dependencies using Fabric.js and identify affected versions (pre-7.2.0). Within 7 days: Patch all affected instances to Fabric.js 7.2.0 or later through your dependency management system and deploy to production. …
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External POC / Exploit Code
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