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OpenAdvisories
High · 8.1 CVE-2026-34528 EUVD-2026-18050GHSA-x8jc-jvqm-pm3fGO-2026-5747

File Browser's Signup Grants Execution Permissions When Default Permissions Includes Execution

Published Apr 1, 2026 · Updated Apr 2, 2026 · Assigned by GitHub_M

Description

File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to version 2.62.2, the signupHandler in File Browser applies default user permissions via d.settings.Defaults.Apply(user), then strips only Admin. The Execute permission and Commands list from the default user template are not stripped. When an administrator has enabled signup, server-side execution, and set Execute=true in the default user template, any unauthenticated user who self-registers inherits shell execution capabilities and can run arbitrary commands on the server. This issue has been patched in version 2.62.2.

Affected products

VendorProductAffectedFixed
filebrowser filebrowser < 2.62.2 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/filebrowser/filebrowser all versions — GO-2026-5747
Go github.com/filebrowser/filebrowser/v2 < 2.62.2 2.62.2 GHSA-x8jc-jvqm-pm3f

Advisories 1

References