CVE-2026-73209

An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust its stack and crash. The affected process is terminated, which can cause degradation or denial of service for IMAP. Update to non-vulnerable version. No publicly available exploits...

CVE-2026-73209

An attacker that has valid credentials can send crafted compressed dat...

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 au...

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

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...

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...

CVE-2026-52687

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...

CVE-2026-52687

An attacker that has valid credentials can select a compression algori...

EUVD-2026-67678

Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also not removed when a script is deleted or renamed. The configured Sieve CPU limit can be bypassed,...

CVE-2026-52681

Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also not removed when a script is deleted or renamed. The configured Sieve CPU limit can be bypassed,...

CVE-2026-52681

Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also not removed when a script is deleted or renamed. The configured Sieve CPU limit can be bypassed,...

CVE-2026-52681

CVE-2026-52681 affects Dovecot's Sieve component. CPU resource usage is tracked in the compiled script, so an attacker with valid credentials can reset the accounting by repeatedly changing the active script. Additionally, compiled script files are not removed when a script is deleted or renamed....

CVE-2026-52681

Sieve CPU resource usage is tracked in the compiled script, so an atta...

CVE-2026-42395

A host listed as a trusted proxy can send forwarding information conta...

CVE-2026-42395

CVE-2026-42395 affects Dovecot (OX Dovecot by Open-Xchange, per the advisory reference). A host listed as a trusted proxy can send forwarding information containing a NUL byte , which crashes the login process on the next login attempt, causing degradation or denial of service for logins. Deploym...

CVE-2026-42395

A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause degradation or denial of service for logins. Deployments that do not configure trusted proxies a...

CVE-2026-42395

A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause degradation or denial of service for logins. Deployments that do not configure trusted proxies a...