CVE-2026-0859

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. Limited direct impact.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-01-13 12:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 10:11 UTC Last updatedMost recent change to the record

Details

Published

2026-01-13 12:15 UTC

Last modified

2026-06-17 10:11 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-502 · Unsafe deserialization

Record status

Analyzed

Affected

• typo3 < 10.4.55
• typo3 < 11.5.49
• typo3 < 12.4.41
• typo3 < 13.4.23
• typo3 < 14.0.2

Attack profile CVSS 4.0 · 5.2

Attack vector

Local

Complexity

Low

Attack requirements

Present

Privileges needed

Low

User interaction

None

Confidentiality

None

Integrity

Low

Availability

None