---
id: CVE-2026-55499
title: Cloudreve is a self-hosted file management and sharing system
summary: >-
  Cloudreve is a self-hosted file management and sharing system. Prior to
  4.17.0, a single-file share event-stream subscription resolves the share root
  to the owner’s parent folder and subscribes to that folder topic, allowing an
  authentic…
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-863
vendor: cloudreve
product: github.com/cloudreve/Cloudreve/v4
affected:
  - github.com/cloudreve/Cloudreve/v4 < 4.0.0-20260613030215-0b00dd308f13
  - github.com/cloudreve/Cloudreve/v3 <= 3.0.0-20250225100611-da4e44b77af4
patched:
  - github.com/cloudreve/Cloudreve/v4 4.0.0-20260613030215-0b00dd308f13
published: '2026-07-31'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:51:43.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55499'
references:
  - url: >-
      https://github.com/cloudreve/cloudreve/commit/0b00dd308f132d6e6e8476857ef79f4865600bbc
    label: security-advisories@github.com
  - url: 'https://github.com/cloudreve/cloudreve/releases/tag/4.17.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w8x7-h2px-xmq8
    label: security-advisories@github.com
  - url: >-
      https://github.com/cloudreve/cloudreve/security/advisories/GHSA-w8x7-h2px-xmq8
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-w8x7-h2px-xmq8'
tags:
  - nvd
  - ghsa
  - go
epss: 0.00331
epssPercentile: 0.2349
aliases:
  - GHSA-w8x7-h2px-xmq8
ecosystem: go
ingestedAt: '2026-07-24T21:39:14.906Z'
---

## Overview

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, a single-file share event-stream subscription resolves the share root to the owner’s parent folder and subscribes to that folder topic, allowing an authenticated share recipient to receive names, paths, rename targets, event types, and hashed identifiers for unshared sibling files and folders. This issue is fixed in version 4.17.0.

## Remediation

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

## Package advisory (CVE-2026-55499)

Affected packages:

- `github.com/cloudreve/Cloudreve/v4 < 4.0.0-20260613030215-0b00dd308f13`
- `github.com/cloudreve/Cloudreve/v3 <= 3.0.0-20250225100611-da4e44b77af4`

Patched in:

- `github.com/cloudreve/Cloudreve/v4 4.0.0-20260613030215-0b00dd308f13`

Source: https://github.com/advisories/GHSA-w8x7-h2px-xmq8