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GHSA-jf56-v8jc-jcc5

TYPO3 CMS has Broken Access Control in its File Abstraction Layer

Source: GitHub Advisory Database (reviewed) Low CVE-2026-49738

Packages

EcosystemPackageAffectedFixed 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 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)

References

External links from the advisory. They lead to third-party sites.