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Vulnerability · Published Mar 27, 2026 · Assigned by OX

CVE-2026-24031

High 7.7

In plain English

A high-severity SQL injection in OX Dovecot Pro from Open-Xchange GmbH. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.7High
Exploit odds (30 days)0.4%top 65.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.23dovecot2.4.3-r0ALPINE-CVE-2026-24031
Alpine:v3.24dovecot2.4.3-r0ALPINE-CVE-2026-24031
Debian:13dovecot1:2.4.1+dfsg1-6+deb13u4DEBIAN-CVE-2026-24031
Debian:14dovecot1:2.4.3+dfsg1-1DEBIAN-CVE-2026-24031
Ubuntu:25.10dovecot1:2.4.1+dfsg1-5ubuntu4.1UBUNTU-CVE-2026-24031

Affected products (as reported)

VendorProductVersions
Open-Xchange GmbH OX Dovecot Pro 0 – through 3.1.00 – through 2.4.0

Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

References