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Vulnerabilities

Vulnerability · CVE-2026-0859

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 comm

Published Jan 13, 2026 · catalog updated Jan 13, 2026 · TYPO3 TYPO3 CMS

Last checked Oct 30, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2026-0859 is not in CISA KEV. FIRST estimates a 18.00% chance of exploitation in the next 30 days. Check whether you run TYPO3 TYPO3 CMS.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
18.00%
Remediation
Version ranges on file
Affected products
vendor TYPO3 TYPO3 CMS 14.0.0 <14.0.2

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor TYPO3 TYPO3 CMS 14.0.0 <14.0.214.0.0 <14.0.2

How to fix CVE-2026-0859

  • Upgrade

    CVE-2026-0859 lists a fix boundary at 14.0.2. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 14.0.0 <14.0.2

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-0859 is not in CISA KEV. FIRST estimates a 18.00% chance of exploitation in the next 30 days. Check whether you run TYPO3 TYPO3 CMS.

Which versions are affected?

Compare what you have installed with TYPO3 TYPO3 CMS 14.0.0 <14.0.2 14.0.0 <14.0.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 18.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 13, 2026 · EUVD

    Detected

    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.

  2. Jan 13, 2026 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-0859

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2026-2014

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Jan 13, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 30, 2026
  • EUVDOct 30, 2026