/usr/share/lintian/overrides/hfst is in hfst 3.13.0~r3461-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Build log shows all hardening options used thanks to dh compat=9, so declaring this a false positive
hardening-no-fortify-functions
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