Is CVE-2026-2826 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-2826 being exploited in the wild.

How severe is CVE-2026-2826?

Medium severity, with a CVSS score of 4.3, published 4 April 2026.

Is there a fix for CVE-2026-2826?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-2826 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-2826?

Check whether you run StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-2826: StellarWP Kadence Blocks authorization bypass in process_pattern REST API

CVE-2026-2826 · Severity: medium · CVSS 4.3 · Published 2026-04-04

Kadence Blocks is a popular WordPress plugin used to enhance the website building experience. A security flaw in this plugin allows users with low-level access, such as contributors, to bypass security checks and upload unauthorized images to the website's media library. While this does not allow for full site takeover, it could be used to clutter server storage or host inappropriate content on the organization's infrastructure.

Technologies: StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor. Vendors: StellarWP.

Quick answers

Is CVE-2026-2826 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-2826 being exploited in the wild.
How severe is CVE-2026-2826?: Medium severity, with a CVSS score of 4.3, published 4 April 2026.
Which products and versions are affected?: StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor up to, and including, 3.6.3.
Is there a fix for CVE-2026-2826?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-2826 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-2826?: Check whether you run StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is classified as a missing authorization check (CWE-862) within the `process_pattern` REST API endpoint of the Kadence Blocks plugin. The plugin fails to verify if the requesting user possesses the `upload_files` capability. An authenticated attacker with at least contributor-level permissions can exploit this by providing remote image URLs, which the server will then download and store as media attachments. This issue affects all versions up to and including 3.6.3; it was addressed in version 3.6.4.

Affected products

StellarWP Kadence Blocks — Page Builder Toolkit for Gutenberg Editor up to, and including, 3.6.3

Timeline

2026-04-04: disclosed
2026-04-04: advisory

References

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