CVE-2026-0859
HIGH severity · CVSS 7.8 · Insecure deserialization
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/TYPO3/typo3/commit/3225d705080a1bde57a66689621c947da5a4782f ↗
Additional information
- NVD record
- https://github.com/TYPO3/typo3/commit/3225d705080a1bde57a66689621c947da5a4782fPatch
- https://github.com/TYPO3/typo3/commit/722bf71c118b0a8e4f2c2494854437d846799a13Patch
- https://github.com/TYPO3/typo3/commit/e0f0ceee480c203fbb60b87454f5f193e541d27fPatch
- https://typo3.org/security/advisory/typo3-core-sa-2026-004Advisory