{"action":"Upgrade dovecot to 2.4.3-r0 or later.","affected":[{"fixed":"2.4.3-r0","introduced":"0"}],"component":"dovecot","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.24","exploited":false,"fixed_versions":["2.4.3-r0"],"id":"tcs_01M5NFMN21D7VEF55VF7A3DHFB","modified_at":"2026-10-01T02:17:49.224935353Z","published_at":"2026-03-27T09:16:20.383Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2026-27860","https://security.alpinelinux.org/vuln/CVE-2026-27860"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2026-27860#Alpine:v3.24/dovecot","url":"https://osv.dev/vulnerability/ALPINE-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."}