dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command

A flaw was found in ManageSieve. A remote attacker can exploit this vulnerability by sending a crafted SASL Simple Authentication and Security Layer initial response during the AUTHENTICATE command. This can cause the ManageSieve service to crash repeatedly, leading to a Denial of Service DoS for...

Important: Red Hat Security Advisory: dovecot security update

An update for dovecot is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available fo...

dovecot: denial of service via crafted message before authentication

A flaw was found in dovecot. An unauthenticated and remote attacker can send a crafted message that causes managesieve to allocate an excessive amount of memory, forcing managesieve-login to be unavailable by repeatedly crashing the process, resulting in a denial of service...

RHEL 7 : dovecot (RHSA-2026:26564)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26564 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...

Debian dla-4556 : dovecot-auth-lua - security update

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4556 advisory. ------------------------------------------------------------------------- Debian LTS Advisory DLA-4556-1 [email protected]...

[SECURITY] [DLA 4617-1] dovecot security update

Debian LTS Advisory DLA-4617-1 [email protected] https://www.debian.org/lts/security/ Guilhem Moulin June 05, 2026 https://wiki.debian.org/LTS Package : dovecot Version : 1:2.3.13+dfsg1-2+deb11u4 CVE ID : CVE-2026-33603 CVE-2026-40020 CVE-2026-42006 Debian Bug : 1136444 Multiple...

Debian dla-4617 : dovecot-auth-lua - security update

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4617 advisory. ------------------------------------------------------------------------- Debian LTS Advisory DLA-4617-1 [email protected]...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : Dovecot vulnerabilities (USN-8365-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8365-1 advisory. It was discovered that Dovecot incorrectly treated some variable expansion pipelines as safe in authentication filters. A...

RockyLinux 10 : dovecot (RLSA-2026:19149)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:19149 advisory. dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command CVE-2025-59032 dovecot: denial of service via crafted...

USN-8365-1 dovecot vulnerabilities

It was discovered that Dovecot incorrectly treated some variable expansion pipelines as safe in authentication filters. An attacker could possibly use this issue to perform SQL or LDAP injection attacks. This issue only affected Ubuntu 25.10 and Ubuntu 26.04 LTS. CVE-2026-27851 It was discovered...

[SECURITY] Fedora 43 Update: dovecot-2.4.4-1.fc43

Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are in their subpackages...

[SECURITY] Fedora 44 Update: dovecot-2.4.4-1.fc44

Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are in their subpackages...

Debian dsa-6313 : dovecot-auth-lua - security update

The remote Debian 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6313 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-6313-1 [email protected]...

[SECURITY] [DSA 6313-1] dovecot security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6313-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff May 31, 2026 https://www.debian.org/security/faq -...

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...

dovecot security update

An update is available for dovecot. This update affects Rocky Linux 10. 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...

RLSA-2026:19149 Important: dovecot security update

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 supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Security Fixes: doveco...

dovecot security update

An update is available for dovecot. This update affects Rocky Linux 9. 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...

RLSA-2026:19364 Important: dovecot security update

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 supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Security Fixes: doveco...

CVE-2026-40016

A flaw was found in Dovecot. A remote or local attacker could upload a malicious Sieve script through the ManageSieve service, or locally, to bypass configured CPU time limits for Sieve scripts. This allows the attacker to consume excessive server resources, leading to a degradation of server...