AZL-98316 CVE-2026-33607 affecting package dovecot 2.3.20-1

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...

AZL-98304 CVE-2026-33606 affecting package dovecot 2.3.20-1

Mail content stored by a user can be crafted so that it is interpreted as dsync protocol commands when an administrator later runs dsync with the stream protocol, for example during a migration. Injected commands can modify mailbox state on the destination during migration or replication, includi...

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...

CVE-2026-73208

An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token response does not contain a scope claim, the audience claim is used in its place and checked against the configured required scopes. These are different concepts, and the audience claim...

CVE-2026-73208

Dovecot (Open-Xchange) contains an OAuth2 token validation flaw : when a token response lacks a scope claim , the audience claim is used in its place and checked against configured required scopes. Because these are distinct concepts, a token granted no relevant permissions can be accepted if its...

CVE-2026-73208

An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token response does not contain a scope claim, the audience claim is used in its place and checked against the configured required scopes. These are different concepts, and the audience claim...

EUVD-2026-67680

An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token response does not contain a scope claim, the audience claim is used in its place and checked against the configured required scopes. These are different concepts, and the audience claim...

CVE-2026-52687

CVE-2026-52687 affects Open-Xchange Dovecot . An attacker with valid credentials can select a compression algorithm on the IMAP connection whose decompression state requires large memory , and by opening several such connections, reach the process memory limit with only a few connections. This te...

EUVD-2026-67679

An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression state requires a large amount of memory, and open several such connections. The memory limit of the process is reached with only a few connections, terminating the process and all...

EUVD-2026-67674

An unauthenticated attacker can send an IMAP ID command with a very large number of parameters before logging in, which causes memory and CPU usage to grow disproportionately. The login process can be terminated by the out-of-memory handling, which also terminates all other connections handled by...

EUVD-2026-67673

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-2026-42008

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-2026-42008

CVE-2026-42008 is an authentication bypass in Dovecot (Open-Xchange fork) where forwarding information from a trusted proxy host is not kept separate from Dovecot's own authentication fields. A malicious or compromised trusted proxy host can inject an internal authentication field, allowing it to...

CVE-2026-33606

Mail content stored by a user can be crafted so that it is interpreted as dsync protocol commands when an administrator later runs dsync with the stream protocol, for example during a migration. Injected commands can modify mailbox state on the destination during migration or replication, includi...

EUVD-2026-67660

An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authenticating. If running in high-security mode default for community releases, only the attacker's own connection is terminated. If running in high-performance mode default for Pro...

CVE-2026-33605

An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authenticating. If running in high-security mode default for community releases, only the attacker's own connection is terminated. If running in high-performance mode default for Pro...

EUVD-2026-67659

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...

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...

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...

CVE-2026-33604

Dovecot (Open-Xchange) contains an SMTP smuggling vulnerability in its outbound relay protection. An attacker who can get Dovecot to relay a message—e.g., via Sieve redirect or submission relay —can craft a line ending in the message body to bypass the protection that normally prevents message co...