The feh_unique_filename function in utils.c in feh 1.11.2 and earlier might allow local users to create arbitrary files via a symlink attack on a /tmp/feh_ temporary file, a different vulnerability than CVE-2011-0702.
https://github.com/derf/feh/issues/#issue/32
https://derf.homelinux.org/git/feh/commit/?id=29ab0855f044ef2fe9c295b72abefcb37f0861a5
https://derf.homelinux.org/git/feh/commit/?id=23421a86cc826dd30f3dc4f62057fafb04b3ac40