{"action":"Upgrade dovecot to 1:2.4.1+dfsg1-6+deb13u4 or later.","affected":[{"fixed":"1:2.4.1+dfsg1-6+deb13u4","introduced":"0"}],"component":"dovecot","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:2.4.1+dfsg1-6+deb13u4"],"id":"tcs_01M5NRFY98H063H7D784RGTM37","modified_at":"2026-10-27T09:47:41.709932641Z","published_at":"2026-03-27T09:16:19.767Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-27856","https://security-tracker.debian.org/tracker/CVE-2026-27856"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-27856#Debian:13/dovecot","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-27856"}],"summary":"Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential wil"}