---
id: CVE-2026-112303
title: GDevelop through 5.6.284 Cookie Leak via LocalFileDownloader Resource URLs
summary: >-
  GDevelop desktop app through 5.6.284 contains a credential leak vulnerability
  that allows attackers to steal the gd_resource cookie by supplying
  attacker-controlled resource URLs in project files. Attackers can get victims
  to open a craf…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-522
vendor: GDevelop
product: GDevelop
affected:
  - GDevelop <= 5.6.284
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-19T18:22:03.397383Z'
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T18:22:14.926Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112303'
references:
  - url: 'https://github.com/4ian/GDevelop/issues/9257'
  - url: >-
      https://github.com/4ian/GDevelop/commit/fbb01f40a640c35c6064f827065eda00e5608690
  - url: >-
      https://github.com/4ian/GDevelop/blob/v5.6.284/newIDE/electron-app/app/LocalFileDownloader.js
  - url: >-
      https://github.com/4ian/GDevelop/blob/v5.6.284/newIDE/app/src/ProjectsStorage/LocalFileStorageProvider/LocalFileResourceMover.js
  - url: >-
      https://www.vulncheck.com/advisories/gdevelop-through-5.6.284-cookie-leak-via-localfiledownloader-resource-urls
    label: >-
      VulnCheck Advisory: GDevelop through 5.6.284 Cookie Leak via
      LocalFileDownloader Resource URLs
tags:
  - cve.org
ingestedAt: '2026-10-19T16:32:30.083Z'
---

## Overview

GDevelop desktop app through 5.6.284 contains a credential leak vulnerability that allows attackers to steal the gd_resource cookie by supplying attacker-controlled resource URLs in project files. Attackers can get victims to open a crafted project, causing downloadLocalFile() to send the cookie to their server and expose private cloud project resources.

## Affected

- `GDevelop <= 5.6.284`

## Remediation

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