formats/xml.cpp in Leanify 0.4.3 allows for a controlled out-of-bounds write in xmlmemorywriter::write via characters that require escaping.
{ "versions": [ { "introduced": "0" }, { "last_affected": "0.4.3" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-12835.json"