Vulnerability · Published Oct 19, 2026 · Assigned by VulnCheck
CVE-2026-112303GDevelop through 5.6.284 Cookie Leak via LocalFileDownloader Resource URLs
Medium 4.3
In plain English
A medium-severity security flaw in GDevelop from GDevelop. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 82.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 products (as reported)
Weakness: CWE-522 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
References
- https://github.com/4ian/GDevelop/issues/9257 issue-tracking
- https://github.com/4ian/GDevelop/commit/fbb01f40a640c35c6064f827065eda00e5608690 patch
- https://github.com/4ian/GDevelop/blob/v5.6.284/newIDE/electron-app/app/LocalFileDownloader.js technical-description
- https://github.com/4ian/GDevelop/blob/v5.6.284/newIDE/app/src/ProjectsStorage/LocalFileStorageProvider/LocalFileResourceMover.js technical-description
- VulnCheck Advisory: GDevelop through 5.6.284 Cookie Leak via LocalFileDownloader Resource URLs third-party-advisory