{"action":"Upgrade dovecot to 1:2.3.4.1-4 or later.","affected":[{"fixed":"1:2.3.4.1-4","introduced":"0"}],"component":"dovecot","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:2.3.4.1-4"],"id":"tcs_01M5NDN10WW9FPGRMW0C5A01BC","modified_at":"2026-09-21T07:00:35.043547014Z","published_at":"2019-04-24T17:29:00.397Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-10691","https://security-tracker.debian.org/tracker/CVE-2019-10691"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-10691#Debian:13/dovecot","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-10691"}],"summary":"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."}