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CVE-2026-11607 TYPO3 CVE debrief

CVE-2026-11607 is a high-severity vulnerability affecting TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31, and 14.0.0-14.3.3. The issue allows backend users with access to the Form Framework to use files not ending in .form.yaml as form definitions, which are processed without denying the incorrect file extension. This can be exploited to execute arbitrary SQL statements, potentially allowing attackers to escalate privileges by creating administrative backend user accounts. The vulnerability has a CVSS score of 7.6 and is considered HIGH severity.

Vendor
TYPO3
Product
TYPO3 CMS
CVSS
HIGH 7.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-09
Advisory published
2026-06-09
Advisory updated
2026-06-09

Who should care

Users of TYPO3 CMS, especially those with backend user accounts and access to the Form Framework, should be aware of this vulnerability and take immediate action to mitigate the risk.

Technical summary

The vulnerability arises from the improper handling of form definition files in TYPO3 CMS. Specifically, the application fails to properly validate the file extension of form definitions, allowing files not ending in .form.yaml to be processed. This can be exploited by malicious users to execute arbitrary SQL statements, potentially leading to privilege escalation.

Defensive priority

High

Recommended defensive actions

  • Update TYPO3 CMS to a version that addresses the vulnerability: 10.4.57 or later, 11.5.51 or later, 12.4.46 or later, 13.4.31 or later, or 14.3.3 or later.
  • Restrict access to the Form Framework to only trusted backend users.
  • Monitor for suspicious activity and implement additional security measures to detect and prevent potential exploits.

Evidence notes

The CVE record and NVD detail pages provide official information about the vulnerability. Additional references include TYPO3's security advisory and GitHub commits addressing the issue. [See resourceLinkAnnotations for links]

Official resources

CVE-2026-11607 was published on 2026-06-09T11:16:47.027Z and modified on 2026-06-09T13:46:50.540Z.