CVE-2026-24031
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
76/100
Published: 2026-03-27
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
Low
I:
High
A:
None
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.
Weakness Classification (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| dovecot | dovecot | < 2.4.3 |
| open-xchange | dovecot | < 3.1.4 |
References & Advisories (4)
Vendor Advisory