CVE-2026-46721 Broken Access Control in extension "Frontend User Registration" (sf_register)
Attackers can assign arbitrary frontend user groups during registration or editing, gaining unauthorized access to privileged content and functionality.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46721?
CVE-2026-46721 is a medium-severity missing authorization vulnerability in TYPO3 Extension "Frontend User Registration", published on 19 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The create and edit flows do not restrict which user properties may be submitted and do not enforce access control on the frontend user group assignment. As a result, an attacker can assign an arbitrary frontend user group to a newly registered or edited account, gaining unauthorized access to content and functionality restricted to privileged frontend user groups.
Which versions are affected by CVE-2026-46721?
4 open source packages ship an affected version, including evoweb/sf-register.
| Package | Affected | Fixed in |
|---|---|---|
evoweb/sf-register Packagist | All versions | 13.2.4 |
evoweb/sf-register Packagist | All versions | 13.2.4 |
evoweb/sf-register Packagist | From 14.0.0 | 14.0.2 |
evoweb/sf-register Packagist | From 14.0.0 | 14.0.2 |
How do I fix CVE-2026-46721?
Upgrade evoweb/sf-register to a fixed version for your release line: 13.2.4 or 14.0.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-46721 being exploited?
There is no known exploitation of CVE-2026-46721 in the wild and no public exploit code.
Sources
Also known as GHSA-v348-vr4q-fv9p.