Vulnerability advisory

CVE-2026-49740

TYPO3 CMS - Insecure Deserialization in Core API

Published Jun 9, 2026Updated Oct 28, 2026OSV record ↗

Severity

CVSS 4.0CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H

Affected versions

Repository

Affected commits	Fixed by commit
GIT github.com/typo3/typo3 ↗
fd8745e46bb11773e85524b8ee9650dabe340713 to before 59bfeaaf0136dfe17011786ce825884e48bedc8d	`59bfeaaf0136dfe17011786ce825884e48bedc8d`
6d6bd23afff6a48ee3efeaa68eb829820397d6a1 to before e16ec78165a7d60f09dcac04bfbb309409e174b3	`e16ec78165a7d60f09dcac04bfbb309409e174b3`
Not specified	`48bcf24f31f52cc0b43d3bea4984634bd2cf85c7`
Not specified	`87cd7c5b710c44d3606fed277b040a75dc6a9c02`
Also listed as affected (42) `v14.3.2` `v13.4.30` `v14.3.1` `v13.4.29` `v14.3.0` `v13.4.28` `v14.2.0` `v13.4.27` `v13.4.26` `v14.1.0` `v13.4.25` `v13.4.24` `v13.4.23` `v13.4.22` `v13.4.21` `v14.0.0` `v13.4.20` `v13.4.19` `v13.4.18` `v13.4.17` `v13.4.16` `v13.4.15` `v13.4.14` `v13.4.13` `v13.4.12` `v13.4.11` `v13.4.10` `v13.4.9` `v13.4.8` `v13.4.7` `v13.4.6` `v13.4.5` `v13.4.4` `v13.4.3` `v13.4.2` `v13.4.1` `v13.4.0` `v13.3.0` `v13.2.1` `v13.2.0` `v13.1.0` `v13.0.0`

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.

CVE-2026-49740

Affected versions

Repository

Description

References