{"action":"Upgrade dovecot to 1:2.3.19.1+dfsg1-2.1+deb12u2 or later.","affected":[{"fixed":"1:2.3.19.1+dfsg1-2.1+deb12u2","introduced":"0"}],"component":"dovecot","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["1:2.3.19.1+dfsg1-2.1+deb12u2"],"id":"tcs_01M5NRFZ57QJB25G48CB15T0MB","modified_at":"2026-10-27T09:47:30.323551828Z","published_at":"2026-03-27T09:16:20.073Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-27858","https://security-tracker.debian.org/tracker/CVE-2026-27858"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-27858","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-27858"}],"summary":"Attacker can send a specifically crafted message before authentication that causes managesieve to allocate large amount of memory. Attacker can force managesieve-login to be unavailable by repeatedly"}