CVE-2026-49741: TYPO3 CMS broken access control in Form Framework form_definition table

CVE-2026-49741 · Severity: high · CVSS 4 · Published 2026-06-09

TYPO3 CMS is a popular open-source content management system used for building and managing websites. A security flaw in its Form Framework allows certain administrative users to bypass safety checks and modify form configurations in ways that should be restricted. This could lead to unauthorized access to sensitive data or the ability for an attacker to gain higher-level control over the website.

Technologies: typo3/cms-core (Packagist), typo3/cms-form (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2026-49741 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-49741 being exploited in the wild.
How severe is CVE-2026-49741?
High severity, with a CVSS score of 4, published 9 June 2026.
Which products and versions are affected?
typo3/cms-core (Packagist) >= 14.0.0, < 14.3.3, ECOSYSTEM:introduced=14.0.0,fixed=14.3.3; typo3/cms-form (Packagist) >= 14.0.0, < 14.3.3, ECOSYSTEM:introduced=14.0.0,fixed=14.3.3.
Is there a fix for CVE-2026-49741?
Yes. typo3/cms-core (Packagist): upgrade to 14.3.3 or later; typo3/cms-form (Packagist): upgrade to 14.3.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-49741 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-49741?
Check whether you run typo3/cms-core (Packagist) or typo3/cms-form (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • typo3/cms-core (Packagist): upgrade to 14.3.3 or later
    composer require typo3/cms-core:^14.3.3
  • typo3/cms-form (Packagist): upgrade to 14.3.3 or later
    composer require typo3/cms-form:^14.3.3

Technical details

A vulnerability exists in TYPO3 CMS where backend users with write access to the 'form_definition' database table can bypass the Form Framework's persistence validation and permission checks. By using the 'DataHandler' component to directly manipulate form records, an attacker can inject arbitrary form configurations. This flaw re-introduces legacy attack vectors, specifically SQL injection and privilege escalation, by circumventing the intended security architecture of the Form Framework. The issue is fixed in TYPO3 version 14.3.3 LTS.

Affected products

  • TYPO3 cms-core >= 14.0.0, < 14.3.3
  • TYPO3 cms-form >= 14.0.0, < 14.3.3

Identifiers

  • CVE-2026-49741
  • GHSA-jh32-v29g-68pq

Timeline

  • 2026-06-09: disclosed
  • 2026-06-09: patched
  • 2026-06-12: advisory

References

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