PT-2026-47739 · Typo3 · Typo3/Cms

Alexander Künzl + 2 · Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-47346

Positive Technologies (AI Summary)

CVSS v4.0

7.6

High

Base vector

AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions TYPO3 CMS versions prior to 10.4.57 TYPO3 CMS versions 11.0.0 through 11.5.50 TYPO3 CMS versions 12.0.0 through 12.4.45 TYPO3 CMS versions 13.0.0 through 13.4.30 TYPO3 CMS versions 14.0.0 through 14.3.2

Description Backend users with file write permissions can bypass upload restrictions in the Form Framework by using mixed-case extensions, such as .FORM.YAML. This allows the upload of maliciously crafted form definition files that can execute arbitrary SQL statements, enabling attackers to escalate privileges by creating administrative backend user accounts.

Recommendations Update to version 10.4.57 or later. Update to version 11.5.51 or later. Update to version 12.4.46 or later. Update to version 13.4.31 or later. Update to version 14.3.3 or later.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

CWE-178

Related Identifiers

CVE-2026-47346

Affected Products

Typo3/Cms

References · 5

• https://github.com/TYPO3/typo3/commit/eb2b2251d90339d3ab55df3d4c0378ae0c780b45 · Patch
• https://github.com/TYPO3/typo3/commit/2030617e6f273cee7b756c695f0a48a45a31eb47 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-47346 · Security Note
• https://typo3.org/security/advisory/typo3-core-sa-2026-008 · Vendor Advisory
• https://twitter.com/CVEnew/status/2064342512060276802 · Twitter Post