4.3
Medium
CVE-2026-33607 An attacker that has valid credentials can use IMAP LIST command to consume CPU
Description
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 known.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| OX Dovecot Pro 3.1 | 3.1.0 → < 3.1.6 | 3.1.6 |
| OX Dovecot Pro 2.3 | 2.3.0 → < 3.0.7 | 3.0.7 |
| OX Dovecot CE 2.3 | 2.3.0 → < 2.4.5 | 2.4.5 |
Other CVEs of OX Dovecot Pro
The 44 CVEs of OX Dovecot Pro →
CVE-2026-73209
An attacker that has valid credentials can send crafted compressed data that causes the affected process to exhaust…
6.5
Medium
CVE-2026-73208
An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token…
7.4
High
CVE-2026-52687
An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression…
6.5
Medium
CVE-2026-52681
Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the…
3.1
Low