---
id: CVE-2026-72834
title: >-
  filebrowser before 2.63.19 contains a permission bypass in the /api/resources
  endpoint
summary: >-
  filebrowser before 2.63.19 contains a permission bypass in the /api/resources
  endpoint. The checksum (?checksum=) branch of resourceGetHandler reads the
  entire file to compute a digest and returns it without performing a
  Perm.Download ch…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-200
published: '2026-08-14'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:32:39.347'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72834'
references:
  - url: >-
      https://github.com/filebrowser/filebrowser/commit/b7dc392838f11d188f0bc0f2a1a99fad3f7dca03
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7whw-q6gh-xr59
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/filebrowser-before-permission-bypass-via-checksum
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00392
epssPercentile: 0.30552
ingestedAt: '2026-09-08T21:11:12.278Z'
---

## Overview

filebrowser before 2.63.19 contains a permission bypass in the /api/resources endpoint. The checksum (?checksum=) branch of resourceGetHandler reads the entire file to compute a digest and returns it without performing a Perm.Download check (unlike the sibling raw, preview, and subtitle paths). As a result, an authenticated user provisioned with Perm.Download=false can obtain a content-hash oracle for any same-scope file (md5/sha1/sha256/sha512), enabling confirmation of known/guessed content, change detection, and offline brute-force of low-entropy files. This is an incomplete fix of CVE-2026-35606; it bypasses only the Download permission and does not defeat scope/path authorization.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.