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CVE-2026-49741 — Vulnerability in typo3/cms-form — CVE Details

HIGH

TYPO3 CMS has Privilege Escalation & SQL Injection in its Form Framework

Published June 12, 2026Updated September 10, 2026Source: osv

Summary

### Problem Backend users with write access to the `form_definition` database table were able to directly create, update, or delete form definition records via `DataHandler`, bypassing the Form Framework's persistence validation and permission checks. This allowed injecting arbitrary form configurations, re-enabling attack vectors originally addressed in [TYPO3-CORE-SA-2018-003](https://typo3.org/security/advisory/typo3-core-sa-2018-003), including SQL injection and privilege escalation. ### Solution Update to TYPO3 version 14.3.3 LTS that fixes the problem described. ### Credits TYPO3 CMS thanks Selçuk Güney for reporting this issue, and to TYPO3 core & security team member Oliver Hader for fixing it. ### Resources * [TYPO3-CORE-SA-2026-017](https://typo3.org/security/advisory/typo3-core-sa-2026-017)

Advisory Timeline

  • First published June 12, 2026 (122 days ago).
  • Last revised September 10, 2026 — 89 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Composer
Update typo3/cms-form to 14.3.3 or later
composer require "typo3/cms-form:^14.3.3"
Composer
Update typo3/cms-core to 14.3.3 or later
composer require "typo3/cms-core:^14.3.3"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: packagist (2).

PackageEcosystemAffectedFixed In
typo3/cms-form
packagist
v14.0.0, v14.0.1, v14.0.2, v14.1.0 (+5 more)14.3.3
typo3/cms-core
packagist
v14.0.0, v14.0.1, v14.0.2, v14.1.0 (+5 more)14.3.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.3 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

References

Frequently Asked Questions

What is CVE-2026-49741?
TYPO3 CMS has Privilege Escalation & SQL Injection in its Form Framework This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.3/10).
How do I check if my project is affected by CVE-2026-49741?
CVE-2026-49741 affects typo3/cms-form and typo3/cms-core. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-49741 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.3

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-jh32-v29g-68pq

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