Vulnerability in Gdevelop
CVE-2026-112303
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/4ian/GDevelop/issues/9257 (issue-tracking)
- github.com/4ian/GDevelop/commit/fbb01f40a640c35c6064f827065eda00e5608690 (patch)
- github.com/4ian/GDevelop/blob/v5.6.284/newIDE/electron-app/app/LocalFileDownloa… (technical-description)
- github.com/4ian/GDevelop/blob/v5.6.284/newIDE/app/src/ProjectsStorage/LocalFile… (technical-description)
- www.vulncheck.com/advisories/gdevelop-through-5.6.284-cookie-leak-via-localfile… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112303?
- CVE-2026-112303 is a medium-severity vulnerability in Gdevelop, classified under Insufficiently Protected Credentials. CVSS score: 4.3/10. Published 2026-10-19.
- How severe is CVE-2026-112303?
- Medium severity. CVSS v3 base score is 4.3 out of 10.