ALAS2023-2026-3109: Security update for 10 packages

ALAS2023-2026-3109, released September 28, 2026, fixes 6 CVEs across 10 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

0.0045

39th percentile

Priority of the 6 CVEs

Patch now 0
                                Urgent 0
                                High 5
                                Routine 1

Fixed package versions

Product	Release	Fixed in
dovecot	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-debuginfo	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-debugsource	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-devel	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-mysql	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-mysql-debuginfo	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-pgsql	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-pgsql-debuginfo	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-pigeonhole	amzn 2023	1:2.3.20-1.amzn2023.0.4
dovecot-pigeonhole-debuginfo	amzn 2023	1:2.3.20-1.amzn2023.0.4

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
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-2026-42007	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
Routine	CVE-2026-42008	dovecot: Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authent...	4.3	0.0024	None reported

Also fixes CVE-2026-42391

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
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
RHSA-2026:80825
dovecot, dovecot-devel, dovecot-mysql and 2 more on RHEL 9

Vendor advisory

https://alas.aws.amazon.com/AL2023/ALAS-2026-3109.html

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