RHSA-2026:80825: Security update for 5 packages

RHSA-2026:80825, released October 13, 2026, fixes 8 CVEs across 5 products. None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

9.1

Base score, 0 to 10

Highest EPSS

0.0055

46th percentile

Priority of the 8 CVEs

Patch now 0
                                Urgent 0
                                High 8
                                Routine 0

Fixed package versions

Product	Release	Fixed in
dovecot	RHEL 9	1:2.3.16-18.el9_8.8
dovecot-devel	RHEL 9	1:2.3.16-18.el9_8.8
dovecot-mysql	RHEL 9	1:2.3.16-18.el9_8.8
dovecot-pgsql	RHEL 9	1:2.3.16-18.el9_8.8
dovecot-pigeonhole	RHEL 9	1:2.3.16-18.el9_8.8

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-33263	dovecot: When mail_max_userip_connections is set (default 10) and reached, submission-login can crash with epoll() panic cause...	9.1	0.0055	None reported
High	CVE-2026-33605	dovecot: An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authe...	9.1	0.0045	None reported
High	CVE-2026-42391	dovecot: An unauthenticated attacker can send an IMAP ID command with a very large number of parameters before logging in, whi...	9.1	0.0045	None reported
High	CVE-2026-27852	dovecot: Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind	9.1	0.0043	None reported
High	CVE-2026-40019	dovecot: An unauthenticated attacker can send a truncated quoted argument to the ManageSieve login process, which makes it spi...	9.1	0.0037	None reported
High	CVE-2026-42007	dovecot: An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-fr...	9.1	0.0035	None reported
High	CVE-2026-40018	dovecot: None None None No publicly available exploits are known.	9.1	0.0032	None reported
High	CVE-2026-73208	dovecot: An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token respon...	9.1	0.0031	None reported

Also fixes CVE-2026-33263

SUSE-SU-2026:4139-1
dovecot23 on sles 15.6, sles 15.7
OPENSUSE-SU-2026:21720-1
dovecot24 on opensuse-leap 16.0
SUSE-SU-2026:23595-1
dovecot24 on sles 16.0
FEDORA-2026-E8A6485109
dovecot, dovecot-debuginfo, dovecot-debugsource and 7 more on Fedora 43
ELSA-2026-80825
dovecot, dovecot-devel, dovecot-mysql and 2 more on ol 9
ALSA-2026:80825
dovecot, dovecot-devel, dovecot-mysql and 2 more on almalinux 9
RLSA-2026:80825
dovecot on rocky 9
RLSA-2026:79371
dovecot on rocky 10

Vendor advisory

https://access.redhat.com/errata/RHSA-2026:80825

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