What is CVE-2026-2826?

CVE-2026-2826 is a medium-severity vulnerability in Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-04-04.

How severe is CVE-2026-2826?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor

CVE-2026-2826

The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.6.3. This is due to the plugin not properly verifying that a user has the `upload_files` capability in the `process_pattern` REST API endpoint. This makes it possible for authenticated attackers, with contributor level access and above, to upload images to the WordPress Media Library by supplying remote image URLs that the server downloads and creates as media attachments.

Vulnerability class: Broken Access Control

EPSS: 0.003 (22.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

Frequently asked questions

What is CVE-2026-2826?: CVE-2026-2826 is a medium-severity vulnerability in Stellarwp Kadence Blocks — Page Builder Toolkit For Gutenberg Editor, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-04-04.
How severe is CVE-2026-2826?: Medium severity. CVSS v3 base score is 4.3 out of 10.