{"action":"Upgrade dovecot to 1:2.3.19.1+dfsg1-2.1+deb12u7 or later.","affected":[{"fixed":"1:2.3.19.1+dfsg1-2.1+deb12u7","introduced":"0"}],"component":"dovecot","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:2.3.19.1+dfsg1-2.1+deb12u7"],"id":"tcs_01M5NS0EQTXE64V58XP78PX1H0","modified_at":"2026-10-31T16:04:23.047153117Z","published_at":"2026-08-28T12:16:29.503Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-42391","https://security-tracker.debian.org/tracker/CVE-2026-42391"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-42391","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-42391"}],"summary":"An unauthenticated attacker can send an IMAP ID command with a very large number of parameters before logging in, which causes memory and CPU usage to grow disproportionately. The login process can be"}