---
id: CVE-2026-55497
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, the built-in thumbnail and avatar image decoders limit compressed file
  size but do not limit decoded pixel dimensions, allowing an authenticated user
  to subm…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-409
  - CWE-770
vendor: cloudreve
product: github.com/cloudreve/Cloudreve/v4
affected:
  - github.com/cloudreve/Cloudreve/v4 < 4.0.0-20260613024411-3607f79bb44c
  - github.com/cloudreve/Cloudreve/v3 <= 3.0.0-20250225100611-da4e44b77af4
patched:
  - github.com/cloudreve/Cloudreve/v4 4.0.0-20260613024411-3607f79bb44c
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-2026-55497'
references:
  - url: >-
      https://github.com/cloudreve/cloudreve/commit/3607f79bb44c35d0be4fa8b6e24c0502b51415a9
    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-g9j2-8w95-3vwv
    label: security-advisories@github.com
  - url: >-
      https://github.com/cloudreve/cloudreve/security/advisories/GHSA-g9j2-8w95-3vwv
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-g9j2-8w95-3vwv'
tags:
  - nvd
  - ghsa
  - go
epss: 0.0053
epssPercentile: 0.4234
aliases:
  - GHSA-g9j2-8w95-3vwv
ecosystem: go
ingestedAt: '2026-07-24T21:39:14.929Z'
---

## Overview

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the built-in thumbnail and avatar image decoders limit compressed file size but do not limit decoded pixel dimensions, allowing an authenticated user to submit a small PNG, JPEG, or GIF that triggers an unbounded allocation and terminates the Cloudreve process through fatal out-of-memory behavior. 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-2026-55497)

Affected packages:

- `github.com/cloudreve/Cloudreve/v4 < 4.0.0-20260613024411-3607f79bb44c`
- `github.com/cloudreve/Cloudreve/v3 <= 3.0.0-20250225100611-da4e44b77af4`

Patched in:

- `github.com/cloudreve/Cloudreve/v4 4.0.0-20260613024411-3607f79bb44c`

Source: https://github.com/advisories/GHSA-g9j2-8w95-3vwv