CVE-2026-47346

Summary

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 Software

VendorProductVersion RangeStatus
TYPO3TYPO3 CMS0 < 10.4.57affected
TYPO3TYPO3 CMS11.0.0 < 11.5.51affected
TYPO3TYPO3 CMS12.0.0 < 12.4.46affected
TYPO3TYPO3 CMS13.0.0 < 13.4.31affected
TYPO3TYPO3 CMS14.0.0 < 14.3.3affected

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References