CVE-2026-49738
published 2026-06-09CVE-2026-49738: The path allowance check in GeneralUtility::isAllowedAbsPath() performed a plain string prefix comparison without requiring a directory separator boundary…
PriorityP416low2.1CVSS 4.0
AVNACLATPPRHUINVCLVILVANSCNSINSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.36%
28.6th percentile
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. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| typo3 | cms-core | >= 0 < 10.4.57 | 10.4.57 |
| typo3 | cms-core | >= 11.0.0 < 11.5.51 | 11.5.51 |
| typo3 | cms-core | >= 12.0.0 < 12.4.46 | 12.4.46 |
| typo3 | cms-core | >= 13.0.0 < 13.4.31 | 13.4.31 |
| typo3 | cms-core | >= 14.0.0 < 14.3.3 | 14.3.3 |
| typo3 | typo3_cms | < 10.4.57 | 10.4.57 |
| typo3 | typo3_cms | >= 11.0.0 < 11.5.51 | 11.5.51 |
| typo3 | typo3_cms | >= 12.0.0 < 12.4.46 | 12.4.46 |
| typo3 | typo3_cms | >= 13.0.0 < 13.4.31 | 13.4.31 |
| typo3 | typo3_cms | >= 14.0.0 < 14.3.3 | 14.3.3 |
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VulDB
TYPO3 CMS up to 14.3.2 File Abstraction Layer secret.yaml isAllowedAbsPath path traversal (WID-SEC-2026-1835)
vuldb·2026-07-17·CVSS 2.1
CVE-2026-49738 [LOW] TYPO3 CMS up to 14.3.2 File Abstraction Layer secret.yaml isAllowedAbsPath path traversal (WID-SEC-2026-1835)
A vulnerability was found in TYPO3 CMS up to 10.4.56/11.5.50/12.4.45/13.4.30/14.3.2. It has been rated as critical. Impacted is the function GeneralUtility::isAllowedAbsPath of the file /var/www/html-other/secret.yaml of the component File Abstraction Layer. Performing a manipulation results in path traversal.
This vulnerability is known as CVE-2026-49738. Remote exploitation of the attack is possible. No exploit is available.
Upgrading the affected component is advised.
GHSA
TYPO3 CMS has Broken Access Control in its File Abstraction Layer
ghsa·2026-06-12
CVE-2026-49738 [LOW] CWE-22 TYPO3 CMS has Broken Access Control in its File Abstraction Layer
TYPO3 CMS has Broken Access Control in its File Abstraction Layer
### 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 tea
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-06-09
Published