CVE-2026-85400 TYPO3 CMS - Missing Authorization in lowlevel commands
Backend administrators can modify system configuration to escalate privileges or cause denial of service due to missing authorization checks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85400?
CVE-2026-85400 is a high-severity missing authorization vulnerability in TYPO3 CMS, published on 8 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Backend administrators without system maintainer privileges were able to schedule any of the configuration:read, configuration:set, and configuration:show commands. This allowed them to modify arbitrary system configuration, which is normally limited to system maintainers. As a consequence, this allowed them, for example, to gain system maintainer privileges or cause a denial of service. Exploiting this vulnerability requires an administrator-level backend user account. This issue affects TYPO3 CMS versions 14.2.0-14.3.6.
Which versions are affected by CVE-2026-85400?
How do I fix CVE-2026-85400?
No fix has been published for CVE-2026-85400 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-85400 being exploited?
There is no known exploitation of CVE-2026-85400 in the wild and no public exploit code.