GHSA-3p42-w5ch-gg42
TYPO3 CMS has an Open Redirect Vulnerability via Core Utilities
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | typo3/cms-core | < 10.4.57 | 10.4.57 |
| Packagist | typo3/cms-core | >= 11.0.0, < 11.5.51 | 11.5.51 |
| Packagist | typo3/cms-core | >= 12.0.0, < 12.4.46 | 12.4.46 |
| Packagist | typo3/cms-core | >= 13.0.0, < 13.4.31 | 13.4.31 |
| Packagist | typo3/cms-core | >= 14.0.0, < 14.3.3 | 14.3.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Problem
Applications that use `GeneralUtility::sanitizeLocalUrl` to allow only local URLs are vulnerable to open redirect attacks if the URL is used after it has passed the aforementioned sanitization checks. This enables attackers to redirect users to external content and carry out phishing attacks.
### 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 Alexandre Romao for reporting this issue, and TYPO3 core & security team member Benjamin Franzke for fixing it.
### Resources
* [TYPO3-CORE-SA-2026-009](https://typo3.org/security/advisory/typo3-core-sa-2026-009)
References
External links from the advisory. They lead to third-party sites.
- https://github.com/TYPO3/typo3/security/advisories/GHSA-3p42-w5ch-gg42
- https://nvd.nist.gov/vuln/detail/CVE-2026-47347
- https://github.com/TYPO3/typo3/commit/22c2dd5398ebc4cb7aa4aa37e02cb39181dee0cd
- https://github.com/TYPO3/typo3/commit/3ffc0835012c6199db0e1dc4b56a77147d8600e0
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-47347.yaml
- https://github.com/TYPO3/typo3
- https://typo3.org/security/advisory/typo3-core-sa-2026-009