CVE-2026-109162

Medium

Description

Forms using FileUpload or ImageUpload elements with a custom saveToFileMount configured stored uploaded files in the default storage folder 1:/user_upload/ instead of the configured destination. This could cause uploaded files to end up in a publicly accessible storage even though a restricted, non-public storage had been configured. Files stored this way are served directly, without the access checks applied to non-public storages. Forms that use the default value for saveToFileMount are not affected. This issue affects TYPO3 CMS versions 14.0.0-14.3.8.

SeverityMedium
CVSS6.3
Exploit probability—
ProductTYPO3 CMS
PublishedOct 13, 2026
First seenOct 13, 2026

How to fix

Affected products

ProductAffected versionsFixed in
TYPO3 TYPO3 CMS14.0.0 ≤ v < 14.3.914.3.9

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