Important: Red Hat Security Advisory: dovecot security update

An update for dovecot is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...

RHEL 9 : dovecot (RHSA-2026:44357)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:44357 advisory. 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...

RockyLinux 9 : dovecot (RLSA-2026:41905)

The remote RockyLinux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:41905 advisory. dovecot: Dovecot: Denial of Service via excessive IMAP bracing CVE-2026-42006 Tenable has extracted the preceding description block directly from the RockyLinux...

RockyLinux 10 : dovecot (RLSA-2026:41988)

The remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:41988 advisory. dovecot: Dovecot: Denial of Service via excessive IMAP bracing CVE-2026-42006 Tenable has extracted the preceding description block directly from the RockyLinux...

RHEL 10 : dovecot (RHSA-2026:42091)

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:42091 advisory. 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...

RHEL 10 : dovecot (RHSA-2026:41988)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:41988 advisory. 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...

ROS-20260707-73-0044

The vulnerability in dovecot is related to improper control of resource identifiers “resource injection”. Exploiting this vulnerability can allow a perpetrator to cause a service failure...

ROS-20260707-73-0047

The vulnerability in dovecot is related to deficiencies in access control. Exploiting this vulnerability can allow an attacker to enhance their privileges...

RockyLinux 9 : dovecot (RLSA-2026:19364)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:19364 advisory. dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command CVE-2025-59032 dovecot: denial of service via crafted...

Astra Linux – Vulnerability in dovecot

A issue was discovered in the auth component of Dovecot 2.2 and 2.3 before 2.3.20. When two passdb configuration entries exist with the same driver and args settings, incorrect usernamefilter and mechanism settings can be applied to passdb definitions. These incorrectly applied settings can lead ...

CVE-2026-33603

The CVE-2026-33603 affects Dovecot (and client) via a specially crafted base64 exchange to fake SCRAM TLS channel binding. Root cause: attacker positions between Dovecot and client to perform MITM, enabling eavesdropping. Impact: confidentiality and integrity of the conversation can be compromise...

CVE-2026-33603

Attacker can use a specially crafted base64 exchange between Dovecot and Client to fake SCRAM TLS channel binding. This requires that the attacker is able to position itself between Dovecot and the client connection. If successful, the attacker can eavesdrop communications between Dovecot and...

dovecot security update

An update is available for dovecot. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Dovecot is an IMAP server for Linux and other UNIX-like systems, written...

RockyLinux 9 : dovecot (RLSA-2026:13857)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:13857 advisory. dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command CVE-2025-59032 dovecot: denial of service via crafted...

Oracle Linux 8 : dovecot (ELSA-2026-13830)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-13830 advisory. - fix CVE-2026-27858: denial of service via crafted message before authentication RHEL-161630 - fix CVE-2025-59032: ManageSieve: Denial of Service via...

AlmaLinux 8 : dovecot (ALSA-2026:13830)

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:13830 advisory. dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command CVE-2025-59032 dovecot: denial of service via crafted...

Amazon Linux 2 : dovecot, --advisory ALAS2-2026-3252 (ALAS-2026-3252)

The version of dovecot installed on the remote host is prior to 2.2.36-6. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3252 advisory. Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can us...

Linux Distros Unpatched Vulnerability : CVE-2026-24031

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Dovecot SQL based authentication can be bypassed when authusernamechars is cleared by admin. This vulnerability allows bypassing authentication for any user and...

CVE-2026-24031

Dovecot SQL based authentication can be bypassed when authusernamechars is cleared by admin. This vulnerability allows bypassing authentication for any user and user enumeration. Do not clear authusernamechars. If this is not possible, install latest fixed version. No publicly available exploits...

UBUNTU-CVE-2026-24031

Dovecot SQL based authentication can be bypassed when authusernamechars is cleared by admin. This vulnerability allows bypassing authentication for any user and user enumeration. Do not clear authusernamechars. If this is not possible, install latest fixed version. No publicly available exploits...