Deserialization of Untrusted Data in TYPO3 - CVE-2026-49740
Published: June 17, 2026
Vulnerability identifier: #VU134741
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-49740
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data in Core API. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
TYPO3
How to mitigate CVE-2026-49740
Install updates from vendor's website.
TYPO3 - addressed in versions 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3