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Vulnerability · Published Jun 9, 2026 · Assigned by TYPO3

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

High 7.6

In plain English

A high-severity missing authorization in TYPO3 CMS from TYPO3. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.6High
Exploit odds (30 days)0.3%top 83.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagisttypo3/cms-core10.4.57GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-core11.5.51GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-core12.4.46GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-core13.4.31GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-core14.3.3GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-form10.4.57GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-form11.5.51GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-form12.4.46GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-form13.4.31GHSA-hwvq-2w67-rvxp
Packagisttypo3/cms-form14.3.3GHSA-hwvq-2w67-rvxp

Affected products (as reported)

VendorProductVersions
TYPO3 TYPO3 CMS 0 – before 10.4.5711.0.0 – before 11.5.5112.0.0 – before 12.4.4613.0.0 – before 13.4.3114.0.0 – before 14.3.3

Weakness: CWE-178, CWE-862 · Vector: 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

References