Origin validation error in TYPO3 - CVE-2026-19418
Published: August 19, 2026
Vulnerability identifier: #VU144252
CSH Severity: Medium
CVSS v4: 7.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-19418
CWE-ID: CWE-346
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to broken access control in backend and Install Tool. A remote user can perform unauthorized actions with elevated privileges.
Affected software
TYPO3
How to mitigate CVE-2026-19418
Install updates from vendor's website.
TYPO3 - addressed in versions 13.4.34, 14.3.6