Open-Xchange Gmbh Ox Dovecot Pro
44 CVEs affecting Open-Xchange Gmbh Ox Dovecot Pro. Latest disclosed: 2026-08-28. Critical: 1, High: 12.
| CVE | Severity | Score | Published | Summary |
|---|---|---|---|---|
CVE-2026-42007 | Critical | 9.1 | 2026-08-28 | An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write… |
CVE-2026-24031 | High | 7.7 | 2026-03-27 | Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin. This vulnerability allows bypassing authentication for any user… |
CVE-2026-42391 | High | 7.5 | 2026-08-28 | 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 dis… |
CVE-2026-33605 | High | 7.5 | 2026-08-28 | An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authenticating. If running in high-security mod… |
CVE-2026-27852 | High | 7.5 | 2026-08-28 | An attacker that can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters, which causes exce… |
CVE-2026-27858 | High | 7.5 | 2026-03-27 | Attacker can send a specifically crafted message before authentication that causes managesieve to allocate large amount of memory. Attacker can force manages… |
CVE-2025-59032 | High | 7.5 | 2026-03-27 | ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response. This can be used to crash ManageSieve service repeatedly, making it unava… |
CVE-2024-23185 | High | 7.5 | 2024-09-10 | Very large headers can cause resource exhaustion when parsing message. The message-parser normally reads reasonably sized chunks of the message. However, when… |
CVE-2026-73208 | High | 7.4 | 2026-08-28 | 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 aud… |
CVE-2026-40018 | High | 7.4 | 2026-08-28 | None None None No publicly available exploits are known. |
CVE-2026-27851 | High | 7.4 | 2026-05-12 | When safe filter is used with variable expansion, all following pipelines on the same string are incorrectly interpreted as safe too, enabling unsafe data to b… |
CVE-2026-27856 | High | 7.4 | 2026-03-27 | Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured cre… |
CVE-2025-30189 | High | 7.4 | 2025-10-31 | When cache is enabled, some passdb/userdb drivers incorrectly cache all users with same cache key, causing wrong cached information to be used for these users… |
CVE-2026-33603 | Medium | 6.8 | 2026-05-12 | Attacker can use a specially crafted base64 exchange between Dovecot and Client to fake SCRAM TLS channel binding. This requires that the attacker is able to p… |
CVE-2026-27855 | Medium | 6.8 | 2026-03-27 | Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and username is altered in passdb, then OTP cred… |
CVE-2026-73209 | Medium | 6.5 | 2026-08-28 | 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 i… |
CVE-2026-52687 | Medium | 6.5 | 2026-08-28 | An attacker that has valid credentials can select a compression algorithm for the IMAP connection whose decompression state requires a large amount of memory… |
CVE-2026-40017 | Medium | 6.5 | 2026-08-28 | An attacker that can send mail to a user can craft a message header whose values are chosen to collide in an internal hash table, which makes the IMAP THREAD c… |
CVE-2026-40014 | Medium | 6.5 | 2026-08-28 | An attacker that can send mail to a user can craft a message header that makes the IMAP THREAD command consume CPU disproportionate to the size of the message… |
CVE-2026-40205 | Medium | 5.9 | 2026-08-28 | An attacker that holds an OAuth2 token granting only part of the required scopes can authenticate, because when more than one scope is required in the configur… |