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    CVE-2026-72835

    filebrowser versions before v2.63.21 fail to canonicalize paths before evaluating access rules, allowing authenticated users to bypass administrator-defined deny rules using case-variant or backslash-separated paths. Attackers can request files with alternate path representations that match no rule but resolve to the same filesystem object, gaining unauthorized access to denied files within their scope.

    Published:Aug 14, 2026
    Last Modified:Aug 14, 2026
    EPS:Aug 14, 2026
    EPSS Score:
    CVSS Score:6.8

    Affected Products

    Vendor
    Filebrowser
    Product
    Filebrowser

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters

    Related CVEs

    CVE-2026-82238 (CVSS 2.3) — filebrowser from version 2.24.0 contains a race condition in the TUS upload handler that allows authenticated …
    CVE-2026-82237 (CVSS 2.3) — filebrowser through 2.63.23 does not remove share records when a shared file is renamed (only deletion trigger…
    CVE-2026-82236 (CVSS 2.3) — File Browser versions from 2.63.6 through 2.63.23 fail to clean up public share links when a privileged user d…
    CVE-2026-82235 (CVSS 8.2) — filebrowser through 2.63.23 fails to validate named pipes in directory archive and public download handlers, a…
    CVE-2026-62684 (CVSS 2.7) — File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files wit…
    CVE-2026-72838 (CVSS 7.1) — FileBrowser versions before 2.63.19 fail to enforce the declared Upload-Length in the TUS resumable-upload PAT…
    CVE-2026-72837 (CVSS 8.7) — File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authenticatio…
    CVE-2026-72836 (CVSS 9.2) — FileBrowser before 2.63.19 does not account for case-insensitive filesystems when checking home directory owne…
    CVE-2026-72834 (CVSS 5.3) — filebrowser before 2.63.19 contains a permission bypass in the /api/resources endpoint. The checksum (?checksu…
    CVE-2026-72839 (CVSS 9.3) — filebrowser through 2.63.16 fails to properly restrict scope and permissions when self-signup is enabled with …

    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