GHSA-c78m-c52x-jgwp

TYPO3 CMS has Insecure Deserialization via Core API

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-49740

Packages

Ecosystem	Package	Affected	Fixed in
Packagist	typo3/cms-core	< 10.4.57	10.4.57
Packagist	typo3/cms-core	>= 11.0.0, < 11.5.51	11.5.51
Packagist	typo3/cms-core	>= 12.0.0, < 12.4.46	12.4.46
Packagist	typo3/cms-core	>= 13.0.0, < 13.4.31	13.4.31
Packagist	typo3/cms-core	>= 14.0.0, < 14.3.3	14.3.3

Details

As written in the advisory (Markdown source, shown as plain text).

### Problem 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. ### Solution Update to TYPO3 versions 10.4.57 ELTS, 11.5.51 ELTS, 12.4.46 ELTS, 13.4.31 LTS, 14.3.3 LTS that fix the problem described. ### Credits TYPO3 CMS thanks “z3rco”, Chowdhury Faizal Ahammed, Rick Larabee, Vitaly Simonovich, Nozomu Sasaki, Mert Akdag, “tikket”, Shafi Almutairi for reporting this issue, and to TYPO3 core & security team member Oliver Hader for fixing it. ### Resources * [TYPO3-CORE-SA-2026-018](https://typo3.org/security/advisory/typo3-core-sa-2026-018)

References

External links from the advisory. They lead to third-party sites.