EUVD-2026-19780
GHSA-67cg-cpj7-qgc9
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Description
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.1, the resourceGetHandler in http/resource.go returns full text file content without checking the Perm.Download permission flag. All three other content-serving endpoints (/api/raw, /api/preview, /api/subtitle) correctly verify this permission before serving content. A user with download: false can read any text file within their scope through two bypass paths. This vulnerability is fixed in 2.63.1.
Analysis
File Browser versions prior to 2.63.1 allow authenticated users with download permission disabled to bypass access controls and read arbitrary text file content through the resourceGetHandler endpoint in http/resource.go, which fails to validate the Perm.Download permission flag unlike three other content-serving endpoints that correctly enforce this check. This authentication bypass affects any File Browser deployment where users are granted access but restricted from downloading files, and is fixed in version 2.63.1.
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