# CVE-2026-2826: Missing authorization in Kadence Blocks — Page Builder Toolkit for Gutenberg Editor

> Authenticated contributors can bypass authorization checks to upload images to the WordPress Media Library via remote URLs.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Apr 2026
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-h47x-p4xp-xqjf

## What is CVE-2026-2826?

CVE-2026-2826 is a medium-severity missing authorization vulnerability in stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor, published on 4 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-2826?


## How do I fix CVE-2026-2826?

No fix has been published for CVE-2026-2826 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2826 being exploited?

There is no known exploitation of CVE-2026-2826 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2826 and fix it if it is affected.

What it is: CVE-2026-2826 is a medium-severity missing authorization vulnerability in stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor, published on 4 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-2826 in the wild and no public exploit code.

Affected product: stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-2826/ (Markdown: https://insights.sbomify.com/CVE-2026-2826/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2826
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2826
- OSV: https://osv.dev/vulnerability/CVE-2026-2826

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2826/
Summaries are generated and may contain mistakes; the official description above is the record.