Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler. Number of rules (primarily dangerous function names) in C/C++ ruleset: 223 Examining data/pyosmium-3.1.0/lib/base_handler.h Examining data/pyosmium-3.1.0/lib/cast.h Examining data/pyosmium-3.1.0/lib/geom.cc Examining data/pyosmium-3.1.0/lib/index.cc Examining data/pyosmium-3.1.0/lib/io.cc Examining data/pyosmium-3.1.0/lib/merge_input_reader.cc Examining data/pyosmium-3.1.0/lib/osm.cc Examining data/pyosmium-3.1.0/lib/osmium.cc Examining data/pyosmium-3.1.0/lib/osmium_module.h Examining data/pyosmium-3.1.0/lib/replication.cc Examining data/pyosmium-3.1.0/lib/simple_handler.h Examining data/pyosmium-3.1.0/lib/simple_writer.cc Examining data/pyosmium-3.1.0/lib/write_handler.cc FINAL RESULTS: data/pyosmium-3.1.0/lib/osm.cc:383:60: [2] (misc) open: Check when opening files - can an attacker redirect it (via symlinks), force the opening of special file type (e.g., device files), move things around to create a race condition, control its ancestors, or change its contents? (CWE-362). .def_property_readonly("open", &osmium::Changeset::open, data/pyosmium-3.1.0/lib/merge_input_reader.cc:170:55: [1] (buffer) read: Check buffer boundaries if used in a loop including recursive loops (CWE-120, CWE-20). while (osmium::memory::Buffer buffer = reader.read()) { ANALYSIS SUMMARY: Hits = 2 Lines analyzed = 1802 in approximately 0.10 seconds (17656 lines/second) Physical Source Lines of Code (SLOC) = 1533 Hits@level = [0] 0 [1] 1 [2] 1 [3] 0 [4] 0 [5] 0 Hits@level+ = [0+] 2 [1+] 2 [2+] 1 [3+] 0 [4+] 0 [5+] 0 Hits/KSLOC@level+ = [0+] 1.30463 [1+] 1.30463 [2+] 0.652316 [3+] 0 [4+] 0 [5+] 0 Dot directories skipped = 2 (--followdotdir overrides) Minimum risk level = 1 Not every hit is necessarily a security vulnerability. There may be other security vulnerabilities; review your code! See 'Secure Programming HOWTO' (https://dwheeler.com/secure-programs) for more information.