Insufficient Type Distinction in TYPO3 - CVE-2026-15305
Published: July 17, 2026 / Updated: August 19, 2026
Vulnerability identifier: #VU138322
CSH Severity: Medium
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-15305
CWE-ID: CWE-351
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to insufficient type distinction in Form Framework. A remote attacker can upload files with arbitrary MIME types.
Affected software
TYPO3
How to mitigate CVE-2026-15305
Install updates from vendor's website.
TYPO3 - update to 14.3.5