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    CVE-2026-15305

    Users were able to upload files with arbitrary MIME types to forms using FileUpload or ImageUpload elements with allowedMimeTypes configured. The restriction was not enforced server-side because the MimeTypeValidator was registered during form building before concrete form definition properties were applied, resulting in the validator never being added to the processing pipeline. This issue affects TYPO3 CMS versions 14.2.0-14.3.4.

    Published:Jul 14, 2026
    Last Modified:Jul 15, 2026
    EPS:Jul 14, 2026
    EPSS Score:0.00174
    CVSS Score:6.3

    Affected Products

    Vendor
    Typo3
    Product
    Typo3

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-351 Insufficient Type Distinction

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High