IP-DB.com
Türkçe English Deutsch Español
Entrar Obtener clave API
7.4Alta

CVE-2026-27856

Open-Xchange GmbH OX Dovecot Pro; Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterpris… Publicada: (hace 7 meses)

Descripción

Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential will lead into full access to the affected component. Limit access to the doveadm http service port, install fixed version. No publicly available exploits are known.

Debilidad (CWE): CWE-287CWE-208

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

FabricanteProductoVersiones
dovecot dovecot < 2.4.3
open-xchange dovecot < 2.3.22.1
Open-Xchange GmbH OX Dovecot Pro ≤ 2.3.0
Red Hat Red Hat Enterprise Linux 10 —
Red Hat Red Hat Enterprise Linux 6 all versions
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support all versions
Red Hat Red Hat Enterprise Linux 8 —
Red Hat Red Hat Enterprise Linux 9 —

Referencias y parches

Coincidencias CPE (NVD) (4)
  • cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* < 2.4.3
  • cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:* < 2.3.22.1
  • cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:* ≥ 3.0.0 < 3.0.5
  • cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:* ≥ 3.1.0 < 3.1.4

CVE recientes del mismo producto — Dovecot

3.1Baja
CVE-2026-40020
Open-Xchange GmbH OX Dovecot Pro

Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpe…

4.3Media
CVE-2026-42006
Open-Xchange GmbH OX Dovecot Pro; Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

An attacker can cause uncontrolled memory usage with excessive bracing over IMAP. The fix in CVE-2026-27857 was incomplete, only blocking one way of doing this, so there was still another way left open. In particular, the fix was for closing braces, but you c…

5.3Media
CVE-2026-40016
Open-Xchange GmbH OX Dovecot Pro

Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limit…

6.8Media
CVE-2026-33603
Open-Xchange GmbH OX Dovecot Pro

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 position itself between Dovecot and the client connection. If successful, the attacker can eavesdrop …

7.4Alta
CVE-2026-27851
Open-Xchange GmbH OX Dovecot Pro; Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 6; Red Hat Red Hat Enterprise Linux 8

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 be unescaped. This can enable SQL / LDAP injection attacks when used in authentication. Avoid using s…

5.3Media
CVE-2026-27859
Open-Xchange GmbH OX Dovecot Pro

A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters…