{"id":"CVE-2025-59028","details":"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 server to break concurrent logins. Install fixed version or disable concurrency in login processes (heavy perfomance penalty on large deployments). No publicly available exploits are known.","modified":"2026-06-18T03:55:35.170418759Z","published":"2026-03-27T08:10:15.246Z","related":["SUSE-SU-2026:21208-1","openSUSE-SU-2026:10442-1","openSUSE-SU-2026:20554-1"],"database_specific":{"cwe_ids":["CWE-20"],"unresolved_ranges":[{"extracted_events":[{"last_affected":"3.1.0"},{"last_affected":"2.4.0"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"OX","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59028.json"},"references":[{"type":"ADVISORY","url":"https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59028.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-59028"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dovecot/core","events":[{"introduced":"0"},{"fixed":"c1b22ef978ca72999e254b2f3964b3d32d1a4979"}],"database_specific":{"cpe":"cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.4.3"}],"source":"CPE_RANGE"}}],"versions":["2.2.20","2.2.20.rc1","2.2.19","2.2.19.rc2","2.2.19.rc1","2.2.18","2.2.17","2.2.17.rc2","2.2.17.rc1","2.2.16","2.2.16.rc1","2.2.15","2.2.14","2.2.14.rc1","2.2.13","2.2.13.rc1","2.2.12","2.2.11","2.2.10","2.2.9","2.2.8","2.2.7","2.2.6","2.2.5","2.2.4","2.2.3","2.2.2","2.2.1","2.2.0","2.2.rc7","2.2.rc6","2.2.rc5","2.2.rc4","2.2.rc3","2.2.rc2","2.2.rc1","2.2.beta2","2.2.beta1","2.2.alpha1","2.1.rc6","2.1.rc5","2.1.rc4","2.1.rc3","2.1.rc2","2.1.rc1","2.1.beta1","2.1.alpha2","2.1.alpha1","2.0.8","2.0.7","2.0.6","2.0.5","2.0.4","2.0.3","2.0.2","2.0.1","2.0.0","2.0.rc6","2.0.rc5","2.0.rc4","2.0.rc3","2.0.rc2","2.0.rc1","2.0.beta6","2.0.beta5","2.0.beta4","2.0.beta3","2.0.beta2","2.0.beta1","2.0.alpha3","2.0.alpha2","2.0.alpha1","1.2.rc1","1.2.beta4","1.2.beta3","1.2.beta2","1.2.beta1","1.2.alpha5","1.2.alpha4","1.2.alpha3","1.2.alpha2","1.2.alpha1","1.1.rc3","1.1.rc2","1.1.rc1","1.1.beta16","1.1.beta14","1.1.beta13","1.1.beta12","1.1.beta11","1.1.beta10","1.1.beta9","1.1.beta8","1.1.beta6","1.1.beta5","1.1.beta4","1.1.beta3","1.1.beta2","1.1.beta1","1.1.alpha6","1.1.alpha5","1.1.alpha4","1.1.alpha2","1.1.alpha1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-59028.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}