The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an invalid UTF-8 sequence as the username.
{ "versions": [ { "introduced": "0" }, { "fixed": "2.3.5.2" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-10691.json"
[ { "events": [ { "introduced": "0" }, { "last_affected": "15.0" } ] } ]