CVE-2026-54617

GravitLauncher LaunchServer (open-source Minecraft launcher) is vulnerable to an unauthenticated path traversal in its HTTP file server (FileServerHandler.channelRead0) on port 9274 , which is enabled by default and bound to 0.0.0.0. The root cause is a substring(1) that strips the first characte...

CVE-2026-54617: Improper Limitation of a Pathname to a Restricted Directory

GravitLauncher is an open-source Minecraft launcher based on sashok724's v3. Prior to 5.7.12, an unauthenticated remote actor can send a raw HTTP request target without a leading slash to the default LaunchServer file server on port 9274. FileServerHandler.channelRead0 in...

GHSA-5G75-477J-2C2F LaunchServer FileServerHandler has an unauthenticated path traversal issue

Summary An unauthenticated path traversal in the LaunchServer HTTP file server FileServerHandler lets any remote actor read any file readable by the LaunchServer process e.g. ../../../../etc/passwd. This is a generic arbitrary-file-read primitive, so the fix must address the traversal itself, not...

LaunchServer FileServerHandler has an unauthenticated path traversal issue

Summary An unauthenticated path traversal in the LaunchServer HTTP file server FileServerHandler lets any remote actor read any file readable by the LaunchServer process e.g. ../../../../etc/passwd. This is a generic arbitrary-file-read primitive, so the fix must address the traversal itself, not...

PT-2026-55482

Summary An unauthenticated path traversal in the LaunchServer HTTP file server FileServerHandler lets any remote actor read any file readable by the LaunchServer process e.g. ../../../../etc/passwd. This is a generic arbitrary-file-read primitive, so the fix must address the traversal itself, not...