What’s Vulnerable › Vulnerabilities

CVE-2026-47346: TYPO3 CMS - Broken Access Control in Form Framework

• Severity: high (CVSS 7.6 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-07-23
• Weakness: CWE-178

Description

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. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.

Affected products

• typo3: before 10.4.57; from 11.0.0 before 11.5.51; from 12.0.0 before 12.4.46; from 13.0.0 before 13.4.31; from 14.0.0 before 14.3.3 — fixed in 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3

How to fix

Upgrade to a fixed version: typo3 10.4.57, 11.5.51, 12.4.46, 13.4.31. Check the vendor advisory for mitigations.

References

• https://github.com/TYPO3/typo3/commit/2030617e6f273cee7b756c695f0a48a45a31eb47
• https://github.com/TYPO3/typo3/commit/eb2b2251d90339d3ab55df3d4c0378ae0c780b45
• https://typo3.org/security/advisory/typo3-core-sa-2026-008

Get alerted when CVE-2026-47346 or the next vulnerability affects your stack