Dovecot: Mehrere Schwachstellen
WID-SEC-2026-0891 · first 27.03.2026 · updated 17.09.2026 · CVSS 7,7
What it is about
Dovecot ist ein Open Source IMAP und POP3 E-Mail Server. Ein Angreifer kann mehrere Schwachstellen in Dovecot ausnutzen, um SQL-Injection-Angriffe durchzuführen, die Authentifizierung zu umgehen, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand herbeizuführen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- SQL-Injection-Angriffe durchzuführen
- die Authentifizierung zu umgehen
- vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand herbeizuführen
Am I affected?
Affected according to the BSI:
- Debian Linux
- Amazon Linux 2
- Red Hat Enterprise Linux
- Fedora Linux
- Ubuntu Linux
- SUSE Linux
- Oracle Linux
- SUSE openSUSE
- RESF Rocky Linux
- Open Source Dovecot <2.4.0
- Open Source Dovecot <2.4.3
- cPanel cPanel/WHM <110.0.138
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Dovecot 2.4.0
- Open Source Dovecot 2.4.3
- cPanel cPanel/WHM 110.0.138
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Dovecot Security Advisory vom 2026-03-26 dovecot.org
- openSUSE Security Update OPENSUSE-SU-2026:10442-1 vom 2026-03-30 lists.opensuse.org
- Ubuntu Security Notice USN-8136-1 vom 2026-03-31 ubuntu.com
- Debian Security Advisory DSA-6197 vom 2026-04-07 lists.debian.org
- Debian Security Advisory DSA-6197 vom 2026-04-06 lists.debian.org
- openSUSE Security Update OPENSUSE-SU-2026:20554-1 vom 2026-04-21 lists.opensuse.org
- SUSE Security Update SUSE-SU-2026:21208-1 vom 2026-04-21 lists.suse.com
- Ubuntu Security Notice USN-8136-2 vom 2026-04-28 ubuntu.com
- SUSE Security Update SUSE-SU-2026:1641-1 vom 2026-04-28 lists.suse.com
- Amazon Linux Security Advisory ALAS2-2026-3252 vom 2026-04-30 alas.aws.amazon.com
- Debian Security Advisory DLA-4556 vom 2026-05-01 lists.debian.org
- Red Hat Security Advisory RHSA-2026:13498 vom 2026-05-04 access.redhat.com
- Red Hat Security Advisory RHSA-2026:13830 vom 2026-05-05 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-13498 vom 2026-05-06 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:13857 vom 2026-05-05 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-13857 vom 2026-05-07 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2026:13830 vom 2026-05-07 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-13830 vom 2026-05-07 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2026:13498 vom 2026-05-06 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:13857 vom 2026-05-07 errata.build.resf.org
- Red Hat Security Advisory RHSA-2026:17626 vom 2026-05-14 access.redhat.com
- Red Hat Security Advisory RHSA-2026:17628 vom 2026-05-15 access.redhat.com
- Red Hat Security Advisory RHSA-2026:17630 vom 2026-05-14 access.redhat.com
- Red Hat Security Advisory RHSA-2026:17602 vom 2026-05-14 access.redhat.com
- Red Hat Security Advisory RHSA-2026:17625 vom 2026-05-14 access.redhat.com
and 15 more sources in the original advisory
CVE: CVE-2025-30189, CVE-2025-59028, CVE-2025-59032, CVE-2026-24031, CVE-2026-27856, CVE-2026-27858, CVE-2026-27859, CVE-2026-27860, CVE-2026-0394, CVE-2026-27855, CVE-2025-59031, CVE-2026-27857
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.