CVE-2026-24031

Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin. This vulnerability allows bypassing authentication for any user and user enumeration. Do not clear auth_username_chars. If this is not possible, install latest fixed version. No publicly available exploits are known.

CVSS v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json	Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-24031
https://bugzilla.redhat.com/show_bug.cgi?id=2452181
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24031.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:dovecot:dovecot::::::::
	cpe:2.3:a:open-xchange:dovecot:::::pro:::*

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) La autenticación basada en SQL de Dovecot puede ser eludida cuando auth_username_chars es borrado por el administrador. Esta vulnerabilidad permite eludir la autenticación para cualquier usuario y la enumeración de usuarios. No borre auth_username_chars. Si esto no es posible, instale la última versión corregida. No se conocen exploits disponibles públicamente.

Information

Published : 2026-03-27 09:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-24031

Mitre link : CVE-2026-24031

CVE.ORG link : CVE-2026-24031

JSON object : View

Products Affected

open-xchange

dovecot

dovecot

dovecot

CWE

CWE-89

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

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