Moderate severityOSV Advisory· Published Jan 13, 2026· Updated Jan 13, 2026
TYPO3 CMS Allows Insecure Deserialization via Mailer File Spool
CVE-2026-0859
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
typo3/cms-corePackagist | >= 14.0.0, < 14.0.2 | 14.0.2 |
typo3/cms-corePackagist | >= 13.0.0, < 13.4.23 | 13.4.23 |
typo3/cms-corePackagist | >= 12.0.0, < 12.4.41 | 12.4.41 |
typo3/cms-corePackagist | >= 11.0.0, < 11.5.49 | 11.5.49 |
typo3/cms-corePackagist | >= 10.0.0, < 10.4.55 | 10.4.55 |
Affected products
2Patches
Vulnerability mechanics
References
7- github.com/TYPO3/typo3/commit/3225d705080a1bde57a66689621c947da5a4782fghsapatchWEB
- github.com/TYPO3/typo3/commit/722bf71c118b0a8e4f2c2494854437d846799a13ghsapatchWEB
- github.com/TYPO3/typo3/commit/e0f0ceee480c203fbb60b87454f5f193e541d27fghsapatchWEB
- github.com/advisories/GHSA-7vp9-x248-9vr9ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-0859ghsaADVISORY
- typo3.org/security/advisory/typo3-core-sa-2026-004ghsavendor-advisoryWEB
- github.com/TYPO3/typo3/security/advisories/GHSA-7vp9-x248-9vr9ghsaWEB
News mentions
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