TYPO3 CMS up to 14.3.2 case sensitivity

Summaryinfo

A vulnerability marked as critical has been reported in TYPO3 CMS up to 10.4.56/11.5.50/12.4.45/13.4.30/14.3.2. This impacts an unknown function. This manipulation causes case sensitivity. The identification of this vulnerability is CVE-2026-47346. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in TYPO3 CMS up to 10.4.56/11.5.50/12.4.45/13.4.30/14.3.2 and classified as critical. Affected by this vulnerability is an unknown code. The manipulation with an unknown input leads to a case sensitivity vulnerability. The CWE definition for the vulnerability is CWE-178. The product does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at typo3.org. This vulnerability is known as CVE-2026-47346 since 05/19/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 10.4.57, 11.5.51, 12.4.46, 13.4.31 or 14.3.3 eliminates this vulnerability. Applying the patch 2030617e6f273cee7b756c695f0a48a45a31eb47 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1835). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• TYPO3 Core

Productinfo

Type

• Content Management System

Vendor

• TYPO3

Name

• CMS

Version

• 10.4.0
• 10.4.1
• 10.4.2
• 10.4.3
• 10.4.4
• 10.4.5
• 10.4.6
• 10.4.7
• 10.4.8
• 10.4.9
• 10.4.10
• 10.4.11
• 10.4.12
• 10.4.13
• 10.4.14
• 10.4.15
• 10.4.16
• 10.4.17
• 10.4.18
• 10.4.19
• 10.4.20
• 10.4.21
• 10.4.22
• 10.4.23
• 10.4.24
• 10.4.25
• 10.4.26
• 10.4.27
• 10.4.28
• 10.4.29
• 10.4.30
• 10.4.31
• 10.4.32
• 10.4.33
• 10.4.34
• 10.4.35
• 10.4.36
• 10.4.37
• 10.4.38
• 10.4.39
• 10.4.40
• 10.4.41
• 10.4.42
• 10.4.43
• 10.4.44
• 10.4.45
• 10.4.46
• 10.4.47
• 10.4.48
• 10.4.49
• 10.4.50
• 10.4.51
• 10.4.52
• 10.4.53
• 10.4.54
• 10.4.55
• 10.4.56
• 11.5.0
• 11.5.1
• 11.5.2
• 11.5.3
• 11.5.4
• 11.5.5
• 11.5.6
• 11.5.7
• 11.5.8
• 11.5.9
• 11.5.10
• 11.5.11
• 11.5.12
• 11.5.13
• 11.5.14
• 11.5.15
• 11.5.16
• 11.5.17
• 11.5.18
• 11.5.19
• 11.5.20
• 11.5.21
• 11.5.22
• 11.5.23
• 11.5.24
• 11.5.25
• 11.5.26
• 11.5.27
• 11.5.28
• 11.5.29
• 11.5.30
• 11.5.31
• 11.5.32
• 11.5.33
• 11.5.34
• 11.5.35
• 11.5.36
• 11.5.37
• 11.5.38
• 11.5.39
• 11.5.40
• 11.5.41
• 11.5.42
• 11.5.43
• 11.5.44
• 11.5.45
• 11.5.46
• 11.5.47
• 11.5.48
• 11.5.49
• 11.5.50
• 12.4.0
• 12.4.1
• 12.4.2
• 12.4.3
• 12.4.4
• 12.4.5
• 12.4.6
• 12.4.7
• 12.4.8
• 12.4.9
• 12.4.10
• 12.4.11
• 12.4.12
• 12.4.13
• 12.4.14
• 12.4.15
• 12.4.16
• 12.4.17
• 12.4.18
• 12.4.19
• 12.4.20
• 12.4.21
• 12.4.22
• 12.4.23
• 12.4.24
• 12.4.25
• 12.4.26
• 12.4.27
• 12.4.28
• 12.4.29
• 12.4.30
• 12.4.31
• 12.4.32
• 12.4.33
• 12.4.34
• 12.4.35
• 12.4.36
• 12.4.37
• 12.4.38
• 12.4.39
• 12.4.40
• 12.4.41
• 12.4.42
• 12.4.43
• 12.4.44
• 12.4.45
• 13.4.0
• 13.4.1
• 13.4.2
• 13.4.3
• 13.4.4
• 13.4.5
• 13.4.6
• 13.4.7
• 13.4.8
• 13.4.9
• 13.4.10
• 13.4.11
• 13.4.12
• 13.4.13
• 13.4.14
• 13.4.15
• 13.4.16
• 13.4.17
• 13.4.18
• 13.4.19
• 13.4.20
• 13.4.21
• 13.4.22
• 13.4.23
• 13.4.24
• 13.4.25
• 13.4.26
• 13.4.27
• 13.4.28
• 13.4.29
• 13.4.30
• 14.3.0
• 14.3.1
• 14.3.2

License

• open-source

CPE 2.3info

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CPE 2.2info

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Entryinfo

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