---
id: CVE-2026-72837
title: >-
  File Browser versions before 2.63.20 fail to honor the createUserDir isolation
  in proxy and hook authentication auto-provisioning paths
summary: >-
  File Browser versions before 2.63.20 fail to honor the createUserDir isolation
  in proxy and hook authentication auto-provisioning paths. Attackers with valid
  upstream-authenticated credentials can read, modify, delete, and share files
  be…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-284
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-2026-72837'
references:
  - url: >-
      https://github.com/filebrowser/filebrowser/security/advisories/GHSA-j7jh-37pf-mf8h
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/file-browser-before-privilege-escalation-via-proxy-authentication
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00558
epssPercentile: 0.44157
ingestedAt: '2026-09-08T21:11:12.278Z'
---

## Overview

File Browser versions before 2.63.20 fail to honor the createUserDir isolation in proxy and hook authentication auto-provisioning paths. Attackers with valid upstream-authenticated credentials can read, modify, delete, and share files belonging to other users by exploiting the server root scope assignment.

## Remediation

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