{"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_01M5NRG0EV2DA8DJGQD0K24B55","modified_at":"2026-10-26T11:47:29.928872349Z","published_at":"2026-03-27T09:16:20.383Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-27860","https://security-tracker.debian.org/tracker/CVE-2026-27860"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-27860#Debian:14/dovecot","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-27860"}],"summary":"If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This leads to potentially bypassing restrictions and allows probing of LDAP structure."}