CVE-2026-112303 GDevelop through 5.6.284 Cookie Leak via LocalFileDownloader Resource URLs
Attackers can steal authentication cookies by tricking users into opening malicious project files, exposing private cloud resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-112303?
CVE-2026-112303 is a medium-severity vulnerability in GDevelop, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-522
Which versions are affected by CVE-2026-112303?
How do I fix CVE-2026-112303?
No fix has been published for CVE-2026-112303 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-112303 being exploited?
There is no known exploitation of CVE-2026-112303 in the wild and no public exploit code.
Sources
Also known as GHSA-rq3j-g73v-g6hv.