CVE-2026-0859
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Typo3
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Update
- typo3 typo310.4.55, 11.5.49, 12.4.41, 13.4.23, 14.0.2 or later
- typo3/cms-core14.0.2, 13.4.23, 12.4.41, 11.5.49, 10.4.55 or later
Patches
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| typo3 typo3 | 10.0.0 ≤ v < 10.4.55, 11.0.0 ≤ v < 11.5.49, 12.0.0 ≤ v < 12.4.41, 13.0.0 ≤ v < 13.4.23, 14.0.0 ≤ v < 14.0.2 | 10.4.55, 11.5.49, 12.4.41, 13.4.23, 14.0.2 |
| typo3/cms-corePackagist | 14.0.0 ≤ v < 14.0.2, 13.0.0 ≤ v < 13.4.23, 12.0.0 ≤ v < 12.4.41, 11.0.0 ≤ v < 11.5.49, 10.0.0 ≤ v < 10.4.55 | 14.0.2, 13.4.23, 12.4.41, 11.5.49, 10.4.55 |
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