CVE-2026-33604

An attacker that can get Dovecot to relay a message, for example through Sieve redirect or submission relay, can use a crafted line ending in the message body to bypass the outbound protection that prevents message content from being interpreted as SMTP commands. A downstream mail server that...

The vulnerability of the Dovecot mail server, related to deficiencies in pathname restriction, allows attackers to gain access to confidential data.

The vulnerability of the Dovecot mail server is related to deficiencies in pathname restriction. Exploiting this vulnerability can allow an attacker to gain access to confidential data...

PT-2026-83066

Name of the Vulnerable Software and Affected Versions Dovecot affected versions not specified Description Information forwarded from a host configured as a trusted proxy is not properly isolated from internal authentication fields. This allows a trusted proxy to inject values into internal...

CVE-2026-42008

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

CVE-2026-33604

An attacker that can get Dovecot to relay a message, for example through Sieve redirect or submission relay, can use a crafted line ending in the message body to bypass the outbound protection that prevents message content from being interpreted as SMTP commands. A downstream mail server that...

PT-2026-83052

This update for dovecot24 fixes the following issues: Update to 2.4.5. - CVE-2026-33263: submission-login: panic when mail max userip connections is reached bsc1276794. - CVE-2026-27852: DoS by sending mail with bad header bsc1276799. - CVE-2026-33604: SMTP smuggling via missing dot-stuffing afte...

OPENSUSE-SU-2026:11629-1 dovecot24-2.4.5-1.1 on GA media

These are all security issues fixed in the dovecot24-2.4.5-1.1 package on the GA media of openSUSE Tumbleweed...

PT-2026-83074

Name of the Vulnerable Software and Affected Versions Dovecot versions prior to 2.4.5-1.1 Description An authentication flaw exists where a token intended for a different purpose can be used to authenticate. This occurs when an OAuth2 token response lacks a scope claim, causing the system to use...

CVE-2026-33607

An attacker that has valid credentials can use IMAP LIST command to consume CPU. This can cause degradation or denial of service for IMAP. Monitor system for abnormal CPU usage and kill the offending process and lock account. Alternatively install fixed version. No publicly available exploits are...

CVE-2026-42393

The comparison used for the doveadm password and API key is not fully timing safe and can reveal the length of the configured secret. An attacker with access to the same network as the doveadm service, able to make repeated requests and measure response timing accurately, can learn the length of...

UBUNTU-CVE-2026-42008

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

UBUNTU-CVE-2026-33607

An attacker that has valid credentials can use IMAP LIST command to consume CPU. This can cause degradation or denial of service for IMAP. Monitor system for abnormal CPU usage and kill the offending process and lock account. Alternatively install fixed version. No publicly available exploits are...

UBUNTU-CVE-2026-33604

An attacker that can get Dovecot to relay a message, for example through Sieve redirect or submission relay, can use a crafted line ending in the message body to bypass the outbound protection that prevents message content from being interpreted as SMTP commands. A downstream mail server that...

Astra Linux – Vulnerability in dovecot

The submission service in Dovecot before 2.3.15 allowed for STARTTLS command injection in the lib-smtp library. Sensitive information could be redirected to an address controlled by the attacker...

CVE-2026-75004

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, improper rule name quoting could lead to managesievedisabledactions setting bypass via a crafted rule name in a Sieve script. This issue only affects Roundcube instances using the managesieve plugin...

CVE-2026-75002

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and LITERAL+ byte-count desynchronization could lead to information disclosure or privilege escalation via IMAP command injection...

MiracleLinux 9 : dovecot-2.3.16-18.el9_8.1 (AXSA:2026-1524:06)

The remote MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-1524:06 advisory. dovecot: Dovecot: Denial of Service via excessive IMAP bracing CVE-2026-42006 Tenable has extracted the preceding description block directly from the...

Exploit for SQL Injection in Dovecot

CVE-2026-24031: Dovecot SQL authentication bypass authenticat...

TencentOS Server 2: dovecot (TSSA-2026:0831)

The version of Tencent Linux installed on the remote TencentOS Server 2 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0831 advisory. Package updates are available for TencentOS Server 2 that fix the following vulnerabilities:...

Oracle Linux 7 : dovecot (ELSA-2026-49513)

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-49513 advisory. - Backport fix for CVE-2026-42006 Orabug: 39820967 - Backport fix for CVE-2025-59032 Orabug: 39573795 - Backport fix for CVE-2026-27856 Orabug: 39573795 -...