CVE-2026-24031

HIGH8.2EPSS 0.03%

Published: 3/27/2026Modified: 4/30/2026

Also known as:ALPINE-CVE-2026-24031

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 (2)

Alpine/dovecotfrom 0, < 2.4.3-r0
Debian/dovecotfrom 0, < 1:2.4.1+dfsg1-6+deb13u4

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

References (2)

ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2026-24031
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-24031