{"action":"Upgrade dovecot to 1:2.4.1+dfsg1-6+deb13u6 or later.","affected":[{"fixed":"1:2.4.1+dfsg1-6+deb13u6","introduced":"0"}],"component":"dovecot","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:2.4.1+dfsg1-6+deb13u6"],"id":"tcs_01M5NRQXVRVCJQXVXMP3KMDQWJ","modified_at":"2026-10-01T03:03:22.079013387Z","published_at":"2026-05-12T14:17:01.600Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-33603","https://security-tracker.debian.org/tracker/CVE-2026-33603"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-33603#Debian:13/dovecot","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-33603"}],"summary":"Attacker can use a specially crafted base64 exchange between Dovecot and Client to fake SCRAM TLS channel binding. This requires that the attacker is able to position itself between Dovecot and the cl"}