{"action":"Upgrade dovecot to 1:2.4.5+dfsg1-1 or later.","affected":[{"fixed":"1:2.4.5+dfsg1-1","introduced":"0"}],"component":"dovecot","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:2.4.5+dfsg1-1"],"id":"tcs_01M5NRZR2ED4P0J0WYWGTF75QM","modified_at":"2026-10-31T16:04:23.652670803Z","published_at":"2026-08-28T12:16:29.260Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-42007","https://security-tracker.debian.org/tracker/CVE-2026-42007"],"severity":{"label":"critical","score":9.1},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-42007#Debian:14/dovecot","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-42007"}],"summary":"An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write memory contents beyond the intended buffe"}