CVE-2026-0859TYPO3 CMS Allows Insecure Deserialization via Mailer File Spool
Updated under an hour ago ()
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It affects TYPO3 CMS and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.2 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H
- Weakness (CWE)
- CWE-502
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- TYPO3
- NVD analysis
- Analyzed
- Record last updated
- Jan 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
TYPO3 TYPO3 CMS typo3:cms (from the name) | from 10.0.0 before 10.4.55; from 11.0.0 before 11.5.49; from 12.0.0 before 12.4.41; from 13.0.0 before 13.4.23; from 14.0.0 before 14.0.2 | CNA record |
typo3 typo3 typo3:typo3 | from 10.0.0 before 10.4.55; from 11.0.0 before 11.5.49; from 12.0.0 before 12.4.41; from 13.0.0 before 13.4.23; from 14.0.0 before 14.0.2 | NVD |
References
- https://typo3.org/security/advisory/typo3-core-sa-2026-004vendor-advisory
- https://github.com/TYPO3/typo3/commit/3225d705080a1bde57a66689621c947da5a4782fpatch
- https://github.com/TYPO3/typo3/commit/e0f0ceee480c203fbb60b87454f5f193e541d27fpatch
- https://github.com/TYPO3/typo3/commit/722bf71c118b0a8e4f2c2494854437d846799a13patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.