PT-2026-2638 · Typo3 · Typo3

Elias Häußler + 2 · CVE-2026-0859 · Published 2026-01-13 · Updated 2026-01-14

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions TYPO3 versions 10.0.0 through 10.4.54 TYPO3 versions 11.0.0 through 11.5.48 TYPO3 versions 12.0.0 through 12.4.40 TYPO3 versions 13.0.0 through 13.4.22 TYPO3 versions 14.0.0 through 14.0.1

Description A flaw exists in TYPO3 that allows local users with write access to the spool directory to execute arbitrary PHP code on the web server. This is possible by crafting a malicious file that is deserialized during the mailer:spool:send command.

Recommendations Update TYPO3 versions to a version later than 10.4.54. Update TYPO3 versions to a version later than 11.5.48. Update TYPO3 versions to a version later than 12.4.40. Update TYPO3 versions to a version later than 13.4.22. Update TYPO3 versions to a version later than 14.0.1.

Exploit

Fix

RCE

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-0859

GHSA-7VP9-X248-9VR9

Affected Products

Typo3

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0859.json · Exploit
• https://github.com/TYPO3/typo3/commit/3225d705080a1bde57a66689621c947da5a4782f · Patch
• https://github.com/TYPO3/typo3/commit/722bf71c118b0a8e4f2c2494854437d846799a13 · Patch
• https://github.com/TYPO3/typo3/commit/e0f0ceee480c203fbb60b87454f5f193e541d27f · Patch
• https://typo3.org/security/advisory/typo3-core-sa-2026-004 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-0859 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-7vp9-x248-9vr9 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0859 · Security Note
• https://github.com/TYPO3/typo3 · Note
• https://github.com/TYPO3/typo3/security/advisories/GHSA-7vp9-x248-9vr9 · Note
• https://packagist.org · Note
• https://twitter.com/CVEnew/status/2011054595137552574 · Twitter Post
• https://twitter.com/_cvereports/status/2011259204783206808 · Twitter Post