CVE-2026-47343 TYPO3 CMS - Destructive Actions on File Mount Folders
Non-privileged backend users can delete, move, or rename root folders of active file mounts due to missing authorization checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47343?
CVE-2026-47343 is a high-severity missing authorization vulnerability in TYPO3 CMS, published on 9 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Non-privileged backend users with file mount access were able to perform write operations (move, delete, rename) on folders representing the root of an active file mount due to missing authorization restrictions. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0 through 11.5.50, 12.0.0 through 12.4.45, 13.0.0 through 13.4.30, and 14.0.0 through 14.3.2.
Weakness: CWE-862
Which versions are affected by CVE-2026-47343?
10 open source packages ship an affected version, including typo3/cms-core.
| Package | Affected | Fixed in |
|---|---|---|
typo3/cms-core Packagist | All versions | 10.4.57 |
typo3/cms-core Packagist | All versions | 10.4.57 |
typo3/cms-core Packagist | From 11.0.0 | 11.5.51 |
typo3/cms-core Packagist | From 11.0.0 | 11.5.51 |
typo3/cms-core Packagist | From 12.0.0 | 12.4.46 |
typo3/cms-core Packagist | From 12.0.0 | 12.4.46 |
4 more packages
typo3/cms-core Packagist | From 13.0.0 | 13.4.31 |
typo3/cms-core Packagist | From 13.0.0 | 13.4.31 |
typo3/cms-core Packagist | From 14.0.0 | 14.3.3 |
typo3/cms-core Packagist | From 14.0.0 | 14.3.3 |
How do I fix CVE-2026-47343?
Upgrade typo3/cms-core to a fixed version for your release line: 10.4.57, 11.5.51, 12.4.46 or 13.4.31.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-47343 being exploited?
There is no known exploitation of CVE-2026-47343 in the wild and no public exploit code.
Sources
Also known as GHSA-3v8v-4wg6-r7qh.