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CVE-2026-49740— TYPO3 CMS - Insecure Deserialization in Core API

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版本存在代码问题漏洞，该漏洞源于缓存前端和持久键值存储反序列化PHP有效载荷时未进行完整性验证或类限制，具有底层存储后端写入权限的攻击者可以注入特制的序列化有效载荷，触发PHP对象注入，可能利用小工具链实现远程代码执行或其他高影响效果。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.59% · P46

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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-2026-49740

Vulnerability Information
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Vulnerability Title
TYPO3 CMS - Insecure Deserialization in Core API
Source: CVE Program / CVE List V5
Vulnerability Description
TYPO3's cache frontend (VariableFrontend) and persistent key-value store (Registry) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry database table) could inject a crafted serialized payload to trigger PHP Object Injection, potentially exploiting a gadget chain to achieve Remote Code Execution or other high-impact effects. Exploiting this vulnerability requires direct local write access to the storage, such as the SQL database or file system. 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:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
TYPO3 CMS 代码问题漏洞
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版本存在代码问题漏洞，该漏洞源于缓存前端和持久键值存储反序列化PHP有效载荷时未进行完整性验证或类限制，具有底层存储后端写入权限的攻击者可以注入特制的序列化有效载荷，触发PHP对象注入，可能利用小工具链实现远程代码执行或其他高影响效果。
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-2026-49740

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III. Intelligence Information for CVE-2026-49740

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Vendor Advisories for CVE-2026-49740 (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-2026-49738 TYPO3 CMS - Broken Access Control in File Abstraction Layer
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-502

V. Comments for CVE-2026-49740

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