High severity7.7NVD Advisory· Published Mar 27, 2026· Updated Apr 29, 2026

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 products

Dovecot (software)/Dovecot
cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*
Range: <2.4.3
Open-Xchange/Dovecot
cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:*
Range: <3.1.4

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.jsonnvdVendor Advisory

News mentions

No linked articles in our index yet.

cvss	0.501
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000