CVE-2026-11607: TYPO3 CMS - Broken Access Control in Form Framework

Published Jun 9, 2026
·
Updated

Problem Backend users with access to the Form Framework were able to use files not ending in .form.yaml as form definitions, which were processed without denying the incorrect file extension. Maliciously crafted form definition files can be used to execute arbitrary SQL statements, allowing attackers to escalate privileges by creating administrative backend user accounts.

Solution Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described.

Credits TYPO3 CMS thanks “Ethan” for reporting this issue, and TYPO3 core & security team member Oliver Hader for fixing it.

Resources TYPO3-CORE-SA-2026-019

Other sources

Backend users with access to the Form Framework were able to use files not ending in .form.yaml as form definitions, which were processed without denying the incorrect file extension. 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.

— MITRE

Backend users with access to the Form Framework were able to use files not ending in .form.yaml as form definitions, which were processed without denying the incorrect file extension. 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, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31 and 14.0.0-14.3.3.

— NVD

Affected Software

11 affected componentsFixes available
Typo3 TYPO3 CMS<10.4.57, >=11.0.0<=11.5.51, >=12.0.0<=12.4.46, >=13.0.0<=13.4.31, >=14.0.0<=14.3.3
composer/typo3/cms-form>=14.0.0<14.3.3
14.3.3
composer/typo3/cms-form>=13.0.0<13.4.31
13.4.31
composer/typo3/cms-form>=12.0.0<12.4.46
12.4.46
composer/typo3/cms-form>=11.0.0<11.5.51
11.5.51
composer/typo3/cms-form<10.4.57
10.4.57
composer/typo3/cms-core>=14.0.0<14.3.3
14.3.3
composer/typo3/cms-core>=13.0.0<13.4.31
13.4.31
composer/typo3/cms-core>=12.0.0<12.4.46
12.4.46
composer/typo3/cms-core>=11.0.0<11.5.51
11.5.51
composer/typo3/cms-core<10.4.57
10.4.57

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade composer/typo3/cms-form to a version that resolves this vulnerability.

    Fixed in 14.3.3
  2. Upgrade

    Upgrade composer/typo3/cms-form to a version that resolves this vulnerability.

    Fixed in 13.4.31
  3. Upgrade

    Upgrade composer/typo3/cms-form to a version that resolves this vulnerability.

    Fixed in 12.4.46
  4. Upgrade

    Upgrade composer/typo3/cms-form to a version that resolves this vulnerability.

    Fixed in 11.5.51
  5. Upgrade

    Upgrade composer/typo3/cms-form to a version that resolves this vulnerability.

    Fixed in 10.4.57
  6. Upgrade

    Upgrade composer/typo3/cms-core to a version that resolves this vulnerability.

    Fixed in 14.3.3
  7. Upgrade

    Upgrade composer/typo3/cms-core to a version that resolves this vulnerability.

    Fixed in 13.4.31
  8. Upgrade

    Upgrade composer/typo3/cms-core to a version that resolves this vulnerability.

    Fixed in 12.4.46
  9. Upgrade

    Upgrade composer/typo3/cms-core to a version that resolves this vulnerability.

    Fixed in 11.5.51
  10. Upgrade

    Upgrade composer/typo3/cms-core to a version that resolves this vulnerability.

    Fixed in 10.4.57
  11. Upgrade

    Upgrade TYPO3 CMS to a version that resolves this vulnerability.

    Fixed in 10.4.57 ELTS
  12. Upgrade

    Upgrade TYPO3 CMS to a version that resolves this vulnerability.

    Fixed in 11.5.51 ELTS
  13. Upgrade

    Upgrade TYPO3 CMS to a version that resolves this vulnerability.

    Fixed in 12.4.46 ELTS
  14. Upgrade

    Upgrade TYPO3 CMS to a version that resolves this vulnerability.

    Fixed in 13.4.31 LTS
  15. Upgrade

    Upgrade TYPO3 CMS to a version that resolves this vulnerability.

    Fixed in 14.3.3 LTS
  16. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch TYPO3-CORE-SA-2026-019

Event History

Jun 9, 2026
CVE Published
via MITRE·10:48 AM
Data Sourced
via MITRE·10:48 AM
DescriptionWeakness
Data Sourced
via NVD·11:16 AM
DescriptionSeverityWeakness
Jun 12, 2026
Advisory Published
via GitHub·08:08 PM
Data Sourced
via GitHub·08:08 PM
DescriptionWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-11607?

CVE-2026-11607 has a high severity rating of 7.6 on the CVSS scale.

2

How do I fix CVE-2026-11607?

To mitigate CVE-2026-11607, ensure that access controls are properly implemented for form definitions so that only files ending with .form.yaml are processed.

3

What systems are affected by CVE-2026-11607?

CVE-2026-11607 affects the Typo3 CMS, particularly the Form Framework module.

4

What kind of attacks can result from CVE-2026-11607?

CVE-2026-11607 allows attackers to execute arbitrary SQL statements, potentially compromising the database.

5

When was CVE-2026-11607 published?

CVE-2026-11607 was published on June 9, 2026.

Company

Resources

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