AlmaLinux alert ALSA-2026:19149 (dovecot)

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[Announce]  [Security Advisory] ALSA-2026:19149: dovecot security update (Important)
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Tue, 26 May 2026 20:02:49 +0000
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<0100019e65e1fdd2-b748bee4-7e93-48e5-a9e8-82ac92a5dbcc-000000@email.amazonses.com>
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Article
Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata
notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-05-26

Summary:

Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in
mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox
format. The SQL drivers and authentication plug-ins are provided as subpackages.   

Security Fix(es):  

  * dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE
command (CVE-2025-59032)
  * dovecot: denial of service via crafted message before authentication (CVE-2026-27858)
  * dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)


For more details about the security issue(s), including the impact, a CVSS score, acknowledgments,
and other related information, refer to the CVE page(s) listed in the References section.


Full details, updated packages, references, and other related information:
https://errata.almalinux.org/10/ALSA-2026-19149.html

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AlmaLinux Team
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