sensible-browser in sensible-utils before 0.0.11 does not validate strings before launching the program specified by the BROWSER environment variable, which allows remote attackers to conduct argument-injection attacks via a crafted URL, as demonstrated by a --proxy-pac-file argument.
Created sensible-utils tracking bugs for this issue:
Affects: epel-7 [bug 1524936]
Affects: fedora-all [bug 1524935]
Seems to be fixed with newest 0.0.11 update.