{"action":"Upgrade dovecot to 1:2.4.3+dfsg1-1 or later.","affected":[{"fixed":"1:2.4.3+dfsg1-1","introduced":"0"}],"component":"dovecot","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1:2.4.3+dfsg1-1"],"id":"tcs_01M5NP38GGZXH0F6YC2RG0786Z","modified_at":"2026-10-08T09:47:35.144623697Z","published_at":"2026-03-27T09:16:18.620Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-59028","https://security-tracker.debian.org/tracker/CVE-2025-59028"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-59028#Debian:14/dovecot","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-59028"}],"summary":"When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable serve"}