The process_file function in reader.c in libdoc through 2017-10-23 has a heap-based buffer over-read that allows attackers to cause a denial of service (application crash) via a crafted file.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20451.json"
[ { "events": [ { "introduced": "0" }, { "last_affected": "2017-10-23" } ] } ]