---
id: "CVE-2026-112303"
kind: "vulnerability"
aliases: ["CVE-2026-112303"]
title: "GDevelop desktop: crafted project file leaks gd_resource session cookie"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["desktop", "game-development", "gdevelop", "package"]
not_affected_if: ["no-external-projects", "not-signed-in", "web-editor-only"]
published_at: "2026-10-19T16:17:06+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T04:25:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112303", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# GDevelop desktop: crafted project file leaks gd_resource session cookie

GDevelop's desktop app, through version 5.6.284, sends its gd_resource cookie to any server named in a project file's resource URLs. An attacker who gets a victim to open a crafted project can read the cookie and reach the victim's private cloud project resources.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed GDevelop desktop app version against `5.6.284`, using the app's About dialog or the installed package metadata.
- Look for any project files from untrusted sources that were opened in the app.

## Fix

- Update the GDevelop desktop app to a version newer than `5.6.284`; the sources do not name the exact fixed release.
- Do not open project files from untrusted sources until the app is updated.

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112303

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_