CVE-2026-47346

TYPO3 CMS - Broken Access Control in Form Framework

State: Published
Severity: 7.6 High
Published: Jun 9, 2026
Updated: Jun 11, 2026
Reserved: May 19, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.6 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	TYPO3

Weaknesses

CWE-178 Improper Handling of Case Sensitivity
CWE-862 Missing Authorization

Affected Products

Product	Versions
TYPO3 CMSTYPO3	before 10.4.57Affected 11.0.0 to before 11.5.51Affected 12.0.0 to before 12.4.46Affected 13.0.0 to before 13.4.31Affected 14.0.0 to before 14.3.3Affected

References

https://typo3.org/security/advisory/typo3-core-sa-2026-008vendor-advisory
Git commit of main branchpatch
Git commit of 13.4 branchpatch

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