CVE-2026-24031CWE-89

Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin

High · published March 27, 2026

CVSS v3.1
7.7
EPSS
0%
Percentile
32.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00395 · 32.5th percentile
Weakness
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Published
2026-03-27T08:10Z
EPSS history
Timeline
  • 27 MAR 08:10Z
    Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin
    cvelistv5