TYPO3 CMS PHP Object Injection via VarFront/Reg deserialization (v<14)
CVE-2026-49740 Published on June 9, 2026
TYPO3 CMS - Insecure Deserialization in Core API
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, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31 and 14.0.0-14.3.3.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-49740 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-49740
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Affected Versions
TYPO3 CMS:- Before 10.4.57 is affected.
- Version 11.0.0 and below 11.5.51 is affected.
- Version 12.0.0 and below 12.4.46 is affected.
- Version 13.0.0 and below 13.4.31 is affected.
- Version 14.0.0 and below 14.3.3 is affected.