---
id: CVE-2026-121555
title: >-
  Foxel through 2.4.0 Unauthenticated File Read via /api/fs/stream and
  /api/fs/thumb
summary: >-
  Foxel through 2.4.0 contains a missing authentication vulnerability that
  allows unauthenticated attackers to read files by requesting the
  /api/fs/stream and /api/fs/thumb endpoints. Attackers can supply a VFS mount
  prefix and relative pa…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-306
vendor: DrizzleTime
product: Foxel
affected:
  - Foxel <= 2.4.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-11-03T17:51:37.929301Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T18:27:48.395Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121555'
references:
  - url: 'https://github.com/DrizzleTime/Foxel/issues/152'
    label: 'GitHub Issue #152'
  - url: 'https://github.com/DrizzleTime/Foxel'
  - url: >-
      https://github.com/DrizzleTime/Foxel/commit/73d9fa825e1004d37abb7b10faea0cd7f5bcb463
    label: Fix commit
  - url: >-
      https://github.com/DrizzleTime/Foxel/blob/v2.4.0/domain/virtual_fs/api.py#L164-L182
  - url: 'https://github.com/DrizzleTime/Foxel/blob/v2.4.0/api/routers.py#L31'
  - url: >-
      https://www.vulncheck.com/advisories/foxel-through-2.4.0-unauthenticated-file-read-via-api-fs-stream-and-api-fs-thumb
    label: >-
      VulnCheck Advisory: Foxel through 2.4.0 Unauthenticated File Read via
      /api/fs/stream and /api/fs/thumb
tags:
  - cve.org
epss: 0.00579
epssPercentile: 0.47887
ingestedAt: '2026-11-05T20:33:06.352Z'
---

## Overview

Foxel through 2.4.0 contains a missing authentication vulnerability that allows unauthenticated attackers to read files by requesting the /api/fs/stream and /api/fs/thumb endpoints. Attackers can supply a VFS mount prefix and relative path to retrieve full file contents or thumbnails across all mounts, bypassing PathRule permission grants.

## Affected

- `Foxel <= 2.4.0`

## Remediation

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