Deno is a JavaScript, TypeScript, and WebAssembly runtime. In versions prior to 2.5.3 and 2.2.15, "Deno.FsFile.prototype.stat" and "Deno.FsFile.prototype.statSync" are not limited by the permission model check "--deny-read=./". It's possible to retrieve stats from files that the user do not have explicit read access to (the script is executed with "--deny-read=./"). Similar APIs like "Deno.stat" and "Deno.statSync" require "allow-read" permission, however, when a file is opened, even with file-write only flags and deny-read permission, it's still possible to retrieve file stats, and thus bypass the permission model. Versions 2.5.3 and 2.2.15 fix the issue.