Is this vulnerability remotely exploitable?

Yes. If an application exposes features that allow remote users to submit or share Fabric.js JSON content (e.g., via collaboration, uploads, or CMS integrations), an attacker can supply crafted JSON that results in malicious SVG markup. When another user or an administrator later views the SVG export in a browser, the injected script may execute.

What level of access does an attacker need to exploit this issue?

The attacker needs the ability to influence the JSON input consumed by `loadFromJSON()`. This can range from full authenticated access to a design-editing feature, to more indirect paths like importing shared templates or content from external services. No direct access to the server is required; the vulnerability is triggered when the resulting SVG is rendered by a victim's browser.

What is the safest general fix pattern for this class of bug?

The most robust fix is to implement strict, context-aware escaping for all user-controlled data before it is inserted into SVG or other markup, and to centralize serialization logic so that no attributes bypass this encoding. Complementary measures include limiting which properties can be serialized, validating input models, and treating all external or user-provided SVG-related data as untrusted.

Severity:

HIGH RISK

(7.6)

Stored XSS via Incomplete SVG Escaping (CWE-79) in Fabric.js JSON-to-SVG Export

CVE-2026-27013

Published:

Feb 19, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79;CWE-116

Impact:

Stored Cross-Site Scripting in browser contexts rendering exported SVG

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

Vulnerability Type

Category:

Cross-Site Scripting (XSS)

CWE:

CWE-79;CWE-116

Impact:

Stored Cross-Site Scripting in browser contexts rendering exported SVG

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

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Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Stored XSS via Incomplete SVG Escaping (CWE-79) in Fabric.js JSON-to-SVG Export

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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