---
id: CVE-2026-47346
aliases:
  - GHSA-hwvq-2w67-rvxp
title: TYPO3 CMS has Broken Access Control in its Form Framework
summary: TYPO3 CMS has Broken Access Control in its Form Framework
severity: high
cwe:
  - CWE-178
  - CWE-862
vendor: typo3
product: typo3/cms-core
ecosystem: composer
affected:
  - typo3/cms-core < 10.4.57
  - 'typo3/cms-core >= 11.0.0, < 11.5.51'
  - 'typo3/cms-core >= 12.0.0, < 12.4.46'
  - 'typo3/cms-core >= 13.0.0, < 13.4.31'
  - 'typo3/cms-core >= 14.0.0, < 14.3.3'
  - typo3/cms-form < 10.4.57
  - 'typo3/cms-form >= 11.0.0, < 11.5.51'
  - 'typo3/cms-form >= 12.0.0, < 12.4.46'
  - 'typo3/cms-form >= 13.0.0, < 13.4.31'
  - 'typo3/cms-form >= 14.0.0, < 14.3.3'
patched:
  - typo3/cms-core 10.4.57
  - typo3/cms-core 11.5.51
  - typo3/cms-core 12.4.46
  - typo3/cms-core 13.4.31
  - typo3/cms-core 14.3.3
  - typo3/cms-form 10.4.57
  - typo3/cms-form 11.5.51
  - typo3/cms-form 12.4.46
  - typo3/cms-form 13.4.31
  - typo3/cms-form 14.3.3
published: '2026-06-12'
updated: '2026-06-12'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-hwvq-2w67-rvxp'
references:
  - url: 'https://github.com/TYPO3/typo3/security/advisories/GHSA-hwvq-2w67-rvxp'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-47346'
  - url: >-
      https://github.com/TYPO3/typo3/commit/2030617e6f273cee7b756c695f0a48a45a31eb47
  - url: >-
      https://github.com/TYPO3/typo3/commit/eb2b2251d90339d3ab55df3d4c0378ae0c780b45
  - url: >-
      https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-47346.yaml
  - url: 'https://typo3.org/security/advisory/typo3-core-sa-2026-008'
  - url: 'https://github.com/advisories/GHSA-hwvq-2w67-rvxp'
tags:
  - ghsa
  - composer
epss: 0.00439
epssPercentile: 0.35445
ingestedAt: '2026-07-07T15:41:59.025Z'
---

## Overview

### Problem
Backend users with file write permissions were able to upload form definition files with mixed-case extensions (e.g., `.FORM.YAML`) to bypass the Form Framework's upload restriction. Maliciously crafted form definition files can be used to execute arbitrary SQL statements, allowing attackers to escalate privileges by creating administrative backend user accounts.

### Solution
Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described.

### Credits
TYPO3 CMS thanks Alexander Künzl for reporting this issue, and to TYPO3 core & security team members Oliver Hader and Benjamin Franzke for fixing it.

### Resources
* [TYPO3-CORE-SA-2026-008](https://typo3.org/security/advisory/typo3-core-sa-2026-008)

## Affected packages

- `typo3/cms-core < 10.4.57`
- `typo3/cms-core >= 11.0.0, < 11.5.51`
- `typo3/cms-core >= 12.0.0, < 12.4.46`
- `typo3/cms-core >= 13.0.0, < 13.4.31`
- `typo3/cms-core >= 14.0.0, < 14.3.3`
- `typo3/cms-form < 10.4.57`
- `typo3/cms-form >= 11.0.0, < 11.5.51`
- `typo3/cms-form >= 12.0.0, < 12.4.46`
- `typo3/cms-form >= 13.0.0, < 13.4.31`
- `typo3/cms-form >= 14.0.0, < 14.3.3`

## Remediation

Upgrade to a patched release:

- `typo3/cms-core 10.4.57`
- `typo3/cms-core 11.5.51`
- `typo3/cms-core 12.4.46`
- `typo3/cms-core 13.4.31`
- `typo3/cms-core 14.3.3`
- `typo3/cms-form 10.4.57`
- `typo3/cms-form 11.5.51`
- `typo3/cms-form 12.4.46`
- `typo3/cms-form 13.4.31`
- `typo3/cms-form 14.3.3`