GHSA-jf56-v8jc-jcc5
TYPO3 CMS has Broken Access Control in its File Abstraction Layer
At a glance
- Published
- Updated
- CVE
- CVE-2026-49738
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Description
### Problem The path allowance check in `GeneralUtility::isAllowedAbsPath()` performed a plain string prefix comparison without requiring a directory separator boundary, causing a path like `/var/www/html-other/secret.yaml` to be incorrectly accepted as valid when the project root was `/var/www/html`. Administrator users with access to the File Abstraction Layer were able to create new file storage definitions pointing to directories outside the project root, bypassing this path check. ### 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 Wolfgang Klinger for reporting this issue, and to TYPO3 core & security team member Oliver Hader for fixing it. ### Resources * [TYPO3-CORE-SA-2026-016](https://typo3.org/security/advisory/typo3-core-sa-2026-016)
Affected packages
| Package | Versions |
|---|---|
| Packagist · typo3/cms-core | introduced 0, fixed 10.4.57 |
| Packagist · typo3/cms-core | introduced 11.0.0, fixed 11.5.51 |
| Packagist · typo3/cms-core | introduced 12.0.0, fixed 12.4.46 |
| Packagist · typo3/cms-core | introduced 13.0.0, fixed 13.4.31 |
| Packagist · typo3/cms-core | introduced 14.0.0, fixed 14.3.3 |
References
- https://github.com/TYPO3/typo3/security/advisories/GHSA-jf56-v8jc-jcc5 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-49738 ADVISORY
- https://github.com/TYPO3/typo3/commit/150a983a5d687cedcfc33bbe9c335d9a13fd05e5 WEB
- https://github.com/TYPO3/typo3/commit/44c2fa9807944136218a0842e3051c0a379a002d WEB
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-49738.yaml WEB
- https://github.com/TYPO3/typo3 PACKAGE
- https://typo3.org/security/advisory/typo3-core-sa-2026-016 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |