GNU Emacs version 25.3.1 (and other versions most likely) ignores umask when creating a backup save file ("[ORIGINAL_FILENAME]~") resulting in files that may be world readable or otherwise accessible in ways not intended by the user running the emacs binary. An attacker might search for emacs backup save files in order to retrieve security sensible data.
Vulmon
GNU Emacs version 25.3.1 (and other versions most likely) ignores umask when creating a backup save file ("[ORIGINAL_FILENAME]~") resulting in files that may be world readable or otherwise accessible in ways not intended by the user running the emacs binary. An attacker might search for emacs backup save files in order to retrieve security sensible data.
http://www.openwall.com/lists/oss-security/2017/10/31/1 https://debbugs.gnu.org/cgi/bugreport.cgi?bug=29182
Reading the comments, this will most likely never get fixed upstream.