Fabric.js loadFromJSON Server-Side Request Forgery Vulnerability

August 24th, 2026
ZDI-26-588 ZDI-CAN-29318

CVE ID

CVE-2026-19504

CVSS Score

4.0 AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Vendors

Fabric.js

Affected Products

Fabric.js

Vulnerability Details

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Fabric.js. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.

The specific flaw exists within the implementation of the loadFromJSON method. The issue results from the lack of proper validation of a URI prior to accessing resources. An attacker may be able to leverage this vulnerability to gain improper access to network resources.

Additional Details

Fabric.js has issued an update to correct this vulnerability. More details can be found at:
https://github.com/fabricjs/fabric.js/pull/11064

Disclosure Timeline

  • 2026-04-07 - Vulnerability reported to vendor
  • 2026-08-24 - Coordinated public release of advisory
  • 2026-08-24 - Advisory Updated

Credit

nedlir

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