GDevelop Cookie Leak via LocalFileDownloader Resource URLs
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-522.
Summary
GDevelop desktop app through 5.6.284 contains a credential leak in which the gd_resource cookie can be stolen through attacker-controlled resource URLs in project files. An attacker needs the victim to open a crafted project, and the downloadLocalFile() function then sends the cookie to the attacker's server, exposing private cloud project resources.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for GDevelop.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Timeline
- 2026-10-19 Threatist record created from CVE-2026-112303
- 2026-10-20 CISA SSVC decision points changed
- 2026-10-20 Alias added: GHSA-rq3j-g73v-g6hv
References
Sources
- CVE-2026-112303 · CVE Program
- CVE-2026-112303 · NVD
- FIRST EPSS
- GHSA-rq3j-g73v-g6hv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences