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CVE-2026-49738— TYPO3 CMS - Broken Access Control in File Abstraction Layer

Quick assessment

Affected
TYPO3 TYPO3 CMS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TYPO3 CMS是TYPO3开源的一个内容管理系统。 TYPO3 CMS 10.4.57之前版本、11.0.0至11.5.51版本、12.0.0至12.4.46版本、13.0.0至13.4.31版本和14.0.0至14.3.3版本存在路径遍历漏洞，该漏洞源于GeneralUtility::isAllowedAbsPath中的路径检查执行了纯字符串前缀比较而未要求目录分隔符边界，导致路径如/var/www/html-other/secret.yaml被错误接受为有效，具有文件抽象层访问权限的管理员用户能够

AI Predicted 8.1 Difficulty: Easy EPSS 0.52% · P42

Affected Version Matrix 5

VendorProduct Version RangeStatus
TYPO3 TYPO3 CMS < 10.4.57 affected
11.0.0< 11.5.51 affected
12.0.0< 12.4.46 affected
13.0.0< 13.4.31 affected
14.0.0< 14.3.3 affected
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I. Basic Information for CVE-2026-49738

Vulnerability Information
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Vulnerability Title
TYPO3 CMS - Broken Access Control in File Abstraction Layer
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
TYPO3 CMS 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TYPO3 CMS是TYPO3开源的一个内容管理系统。 TYPO3 CMS 10.4.57之前版本、11.0.0至11.5.51版本、12.0.0至12.4.46版本、13.0.0至13.4.31版本和14.0.0至14.3.3版本存在路径遍历漏洞，该漏洞源于GeneralUtility::isAllowedAbsPath中的路径检查执行了纯字符串前缀比较而未要求目录分隔符边界，导致路径如/var/www/html-other/secret.yaml被错误接受为有效，具有文件抽象层访问权限的管理员用户能够
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
TYPO3 TYPO3 CMS 0 ~ 10.4.57 -

II. Public POCs for CVE-2026-49738

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III. Intelligence Information for CVE-2026-49738

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Patches & Fixes for CVE-2026-49738 (2)

Vendor Advisories for CVE-2026-49738 (1)

Same Patch Batch · TYPO3 · 2026-06-09 · 13 CVEs total

CVE-2026-47347 TYPO3 CMS - Open Redirect in Core Utilities
CVE-2026-47349 TYPO3 CMS - Broken Access Control in Recycler
CVE-2026-47350 TYPO3 CMS - Broken Access Control in DataHandler
CVE-2026-47348 TYPO3 CMS - Cross-Site Scripting in Indexed Search
CVE-2026-47352 TYPO3 CMS - Broken Access Control in Backend API
CVE-2026-47346 TYPO3 CMS - Broken Access Control in Form Framework
CVE-2026-47351 TYPO3 CMS - Broken Access Control in Clipboard
CVE-2026-47343 TYPO3 CMS - Destructive Actions on File Mount Folders
CVE-2026-11607 TYPO3 CMS - Broken Access Control in Form Framework
CVE-2026-49742 TYPO3 CMS - Broken Access Control in Media Module
CVE-2026-49740 TYPO3 CMS - Insecure Deserialization in Core API
CVE-2026-49741 TYPO3 CMS - Privilege Escalation & SQL Injection in Form Framework

IV. Related Vulnerabilities

Same product: TYPO3 CMS
Same vendor: TYPO3
Same weakness: CWE-22

V. Comments for CVE-2026-49738

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