SUSE-SU-2026:21208-1: important: Security update for dovecot24
SLE-SECURITY-UPDATES
null at suse.de
Tue Apr 21 12:32:36 UTC 2026
# Security update for dovecot24
Announcement ID: SUSE-SU-2026:21208-1
Release Date: 2026-04-16T13:10:27Z
Rating: important
References:
* bsc#1260893
* bsc#1260894
* bsc#1260895
* bsc#1260896
* bsc#1260897
* bsc#1260898
* bsc#1260899
* bsc#1260900
* bsc#1260901
* bsc#1260902
Cross-References:
* CVE-2025-59028
* CVE-2025-59031
* CVE-2025-59032
* CVE-2026-24031
* CVE-2026-27855
* CVE-2026-27856
* CVE-2026-27857
* CVE-2026-27858
* CVE-2026-27859
* CVE-2026-27860
CVSS scores:
* CVE-2025-59028 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
* CVE-2025-59028 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
* CVE-2025-59031 ( SUSE ): 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
* CVE-2025-59031 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
* CVE-2025-59031 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
* CVE-2025-59032 ( SUSE ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2025-59032 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2025-59032 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-24031 ( SUSE ): 9.2
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
* CVE-2026-24031 ( SUSE ): 7.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
* CVE-2026-24031 ( NVD ): 7.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
* CVE-2026-27855 ( SUSE ): 7.6
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
* CVE-2026-27855 ( SUSE ): 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
* CVE-2026-27855 ( NVD ): 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
* CVE-2026-27856 ( SUSE ): 9.1
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
* CVE-2026-27856 ( SUSE ): 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
* CVE-2026-27856 ( NVD ): 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
* CVE-2026-27857 ( SUSE ): 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
* CVE-2026-27857 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-27857 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-27858 ( SUSE ): 8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
* CVE-2026-27858 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-27858 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
* CVE-2026-27859 ( SUSE ): 6.9
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
* CVE-2026-27859 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-27859 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-27860 ( SUSE ): 6.3
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
* CVE-2026-27860 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
* CVE-2026-27860 ( NVD ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected Products:
* SUSE Linux Enterprise Server 16.0
* SUSE Linux Enterprise Server for SAP applications 16.0
An update that solves 10 vulnerabilities can now be installed.
## Description:
This update for dovecot24 fixes the following issues:
* Update to v2.4.3
* CVE-2025-59028: Invalid base64 authentication can cause DoS for other logins
(bsc#1260894).
* CVE-2025-59031: decode2text.sh OOXML extraction may follow symlinks and read
unintended files during indexing (bsc#1260895).
* CVE-2025-59032: pigeonhole: ManageSieve panic occurs with sieve-connect as a
client (bsc#1260902).
* CVE-2026-24031: SQL injection possible if auth_username_chars is configured
empty. Fixed escaping to always happen. v2.4 regression (bsc#1260896).
* CVE-2026-27855: OTP driver vulnerable to replay attack (bsc#1260900).
* CVE-2026-27856: Doveadm credentials were not checked using timing-safe
checking function (bsc#1260899).
* CVE-2026-27857: sending excessive parenthesis causes imap-login to use
excessive memory (bsc#1260898).
* CVE-2026-27858: pigeonhole: managesieve-login can allocate large amount of
memory during authentication (bsc#1260901).
* CVE-2026-27859: excessive RFC 2231 MIME parameters in email would can
excessive CPU usage (bsc#1260897).
* CVE-2026-27860: LDAP query injection possible if auth_username_chars is
configured empty. Fixed escaping to always happen. v2.4 regression
(bsc#1260893).
## Patch Instructions:
To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
* SUSE Linux Enterprise Server 16.0
zypper in -t patch SUSE-SLES-16.0-577=1
* SUSE Linux Enterprise Server for SAP applications 16.0
zypper in -t patch SUSE-SLES-16.0-577=1
## Package List:
* SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
* dovecot24-fts-solr-2.4.3-160000.1.1
* dovecot24-fts-solr-debuginfo-2.4.3-160000.1.1
* dovecot24-debugsource-2.4.3-160000.1.1
* dovecot24-backend-mysql-debuginfo-2.4.3-160000.1.1
* dovecot24-backend-pgsql-debuginfo-2.4.3-160000.1.1
* dovecot24-backend-sqlite-debuginfo-2.4.3-160000.1.1
* dovecot24-devel-2.4.3-160000.1.1
* dovecot24-fts-debuginfo-2.4.3-160000.1.1
* dovecot24-backend-pgsql-2.4.3-160000.1.1
* dovecot24-debuginfo-2.4.3-160000.1.1
* dovecot24-fts-2.4.3-160000.1.1
* dovecot24-2.4.3-160000.1.1
* dovecot24-backend-mysql-2.4.3-160000.1.1
* dovecot24-backend-sqlite-2.4.3-160000.1.1
* SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
* dovecot24-fts-solr-2.4.3-160000.1.1
* dovecot24-fts-solr-debuginfo-2.4.3-160000.1.1
* dovecot24-debugsource-2.4.3-160000.1.1
* dovecot24-backend-mysql-debuginfo-2.4.3-160000.1.1
* dovecot24-backend-pgsql-debuginfo-2.4.3-160000.1.1
* dovecot24-backend-sqlite-debuginfo-2.4.3-160000.1.1
* dovecot24-devel-2.4.3-160000.1.1
* dovecot24-fts-debuginfo-2.4.3-160000.1.1
* dovecot24-backend-pgsql-2.4.3-160000.1.1
* dovecot24-debuginfo-2.4.3-160000.1.1
* dovecot24-fts-2.4.3-160000.1.1
* dovecot24-2.4.3-160000.1.1
* dovecot24-backend-mysql-2.4.3-160000.1.1
* dovecot24-backend-sqlite-2.4.3-160000.1.1
## References:
* https://www.suse.com/security/cve/CVE-2025-59028.html
* https://www.suse.com/security/cve/CVE-2025-59031.html
* https://www.suse.com/security/cve/CVE-2025-59032.html
* https://www.suse.com/security/cve/CVE-2026-24031.html
* https://www.suse.com/security/cve/CVE-2026-27855.html
* https://www.suse.com/security/cve/CVE-2026-27856.html
* https://www.suse.com/security/cve/CVE-2026-27857.html
* https://www.suse.com/security/cve/CVE-2026-27858.html
* https://www.suse.com/security/cve/CVE-2026-27859.html
* https://www.suse.com/security/cve/CVE-2026-27860.html
* https://bugzilla.suse.com/show_bug.cgi?id=1260893
* https://bugzilla.suse.com/show_bug.cgi?id=1260894
* https://bugzilla.suse.com/show_bug.cgi?id=1260895
* https://bugzilla.suse.com/show_bug.cgi?id=1260896
* https://bugzilla.suse.com/show_bug.cgi?id=1260897
* https://bugzilla.suse.com/show_bug.cgi?id=1260898
* https://bugzilla.suse.com/show_bug.cgi?id=1260899
* https://bugzilla.suse.com/show_bug.cgi?id=1260900
* https://bugzilla.suse.com/show_bug.cgi?id=1260901
* https://bugzilla.suse.com/show_bug.cgi?id=1260902
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