Description
TYPO3's mail‑file spool deserialization flaw lets local users with write access to the spool directory craft a malicious file that is deserialized during the mailer:spool:send command, enabling arbitrary PHP code execution on the web server. This issue affects TYPO3 CMS versions 10.0.0-10.4.54, 11.0.0-11.5.48, 12.0.0-12.4.40, 13.0.0-13.4.22 and 14.0.0-14.0.1.
References (4)
Core 4
Core References
Vendor Advisory vendor-advisory
https://typo3.org/security/advisory/typo3-core-sa-2026-004
Scores
CVSS v3
7.8
EPSS
0.0016
EPSS Percentile
6.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-502
Status
published
Products (2)
typo3/cms-core
14.0.0 - 14.0.2Packagist
typo3/typo3
10.0.0 - 10.4.55
Published
Jan 13, 2026
Tracked Since
Feb 18, 2026