What is CVE-2026-44311?

CVE-2026-44311 is a medium-severity vulnerability in Fabricjs Fabric.js, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-22.

How severe is CVE-2026-44311?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Fabricjs Fabric.js

CVE-2026-44311

Fabric.js is a Javascript HTML5 canvas library. Prior to 7.4.0, a potential Cross-Site Scripting (XSS) vulnerability exists in Fabric.js due to improper escaping of user-controlled input during SVG serialization via the toSVG() method. Spe…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Fabricjs Fabric.js — versions < 7.4.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting
CWE-116 — Improper Encoding or Escaping of Output

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-44311?: CVE-2026-44311 is a medium-severity vulnerability in Fabricjs Fabric.js, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-22.
How severe is CVE-2026-44311?: Medium severity. CVSS v3 base score is 5.4 out of 10.