CVE-2026-112303

GDevelop through 5.6.284 Cookie Leak via LocalFileDownloader Resource URLs

State: Published
Severity: 5.3 Medium
Published: Oct 19, 2026
Updated: Oct 19, 2026
Reserved: Oct 19, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N	VulnCheck

Weaknesses

CWE-522 Insufficiently Protected Credentials

Affected Products

Product	Versions
GDevelopGDevelop	5.6.284 and earlierAffected

References

https://github.com/4ian/GDevelop/issues/9257issue-tracking
https://github.com/4ian/GDevelop/commit/fbb01f40a640c35c6064f827065eda00e5608690patch
https://github.com/4ian/GDevelop/blob/v5.6.284/newIDE/electron-app/app/LocalFileDownloader.jstechnical-description
https://github.com/4ian/GDevelop/blob/v5.6.284/newIDE/app/src/ProjectsStorage/LocalFileStorageProvider/LocalFileResourceMover.jstechnical-description
VulnCheck Advisory: GDevelop through 5.6.284 Cookie Leak via LocalFileDownloader Resource URLsthird-party-advisory

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