TYPO3 CMS up to 14.3.2 File Abstraction Layer secret.yaml isAllowedAbsPath path traversal

CVSS Meta Temp Score
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CTI Interest Score
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4.5$0-$5k1.89-

Summaryinfo

A vulnerability categorized as critical has been discovered in TYPO3 CMS up to 10.4.56/11.5.50/12.4.45/13.4.30/14.3.2. The affected element is the function GeneralUtility::isAllowedAbsPath of the file /var/www/html-other/secret.yaml of the component File Abstraction Layer. Executing a manipulation can lead to path traversal. This vulnerability is handled as CVE-2026-49738. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in TYPO3 CMS up to 10.4.56/11.5.50/12.4.45/13.4.30/14.3.2. This vulnerability affects the function GeneralUtility::isAllowedAbsPath of the file /var/www/html-other/secret.yaml of the component File Abstraction Layer. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31 and 14.0.0-14.3.3.

The advisory is shared for download at typo3.org. This vulnerability was named CVE-2026-49738 since 06/01/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 10.4.57, 11.5.51, 12.4.46, 13.4.31 or 14.3.3 eliminates this vulnerability. Applying the patch 150a983a5d687cedcfc33bbe9c335d9a13fd05e5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1835). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • TYPO3 Core

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.7
VulDB Meta Temp Score: 4.5

VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: CMS 10.4.57/11.5.51/12.4.46/13.4.31/14.3.3
Patch: 150a983a5d687cedcfc33bbe9c335d9a13fd05e5

Timelineinfo

06/01/2026 CVE reserved
06/09/2026 +8 days Advisory disclosed
06/09/2026 +0 days VulDB entry created
06/09/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: typo3.org
Status: Confirmed

CVE: CVE-2026-49738 (🔒)
GCVE (CVE): GCVE-0-2026-49738
GCVE (VulDB): GCVE-100-369496
CERT Bund: WID-SEC-2026-1835 - TYPO3 Core: Mehrere Schwachstellen

Entryinfo

Created: 06/09/2026 13:33
Updated: 06/09/2026 17:37
Changes: 06/09/2026 13:33 (72), 06/09/2026 17:37 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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