TYPO3 CMS has Broken Access Control in its Media Module
Problem
Backend users with file download permissions were able to download files from the fallback storage of the file abstraction layer (FAL) via the Media Module. Since the fallback storage resolves paths relative to the server's document root, this could expose sensitive files such as log files.
Solution
Update to TYPO3 versions 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 Hyunseo Shin for reporting this issue, and to TYPO3 security team member Torben Hansen for fixing it.
Resources
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | typo3/cms-core | >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 | 11.5.51, 12.4.46, 13.4.31, 14.3.3 |
| Composer package | typo3/cms-filelist | >= 11.0.0, < 11.5.51, >= 12.0.0, < 12.4.46, >= 13.0.0, < 13.4.31, >= 14.0.0, < 14.3.3 | 11.5.51, 12.4.46, 13.4.31, 14.3.3 |
References
- https://github.com/TYPO3/typo3/security/advisories/GHSA-chm7-4vch-h8vr
- https://nvd.nist.gov/vuln/detail/CVE-2026-49742
- https://github.com/TYPO3/typo3/commit/ad636b6183843b57c758a1e12174a75093ac93c3
- https://github.com/TYPO3/typo3/commit/caa6b444d7ab1bdd1eb76a68004c8be73d98e6ae
- https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-49742.yaml
- https://github.com/TYPO3/typo3
- https://typo3.org/security/advisory/typo3-core-sa-2026-013
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-200, CWE-22- Platform
- Composer
- Package
typo3/cms-core, typo3/cms-filelist- Disclosed
- 12.06.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-chm7-4vch-h8vr - CC BY 4.0
Vulnerability history: typo3/cms-filelist
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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