USN-8136-1: Dovecot vulnerabilities

It was discovered that Dovecot incorrectly handled invalid base64 SASL data. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 25.10. CVE-2025-59028 It was discovered that Dovecot script decode2text.sh incorrectly handled zip files. An attacke...

CVE-2026-24031

Dovecot SQL based authentication can be bypassed when authusernamechars is cleared by admin. This vulnerability allows bypassing authentication for any user and user enumeration. Do not clear authusernamechars. If this is not possible, install latest fixed version. No publicly available exploits...

CVE-2026-24031

Dovecot SQL based authentication can be bypassed when authusernamechars is cleared by admin. This vulnerability allows bypassing authentication for any user and user enumeration. Do not clear authusernamechars. If this is not possible, install latest fixed version. No publicly available exploits...