SQL Injection in Dovecot
CVE-2026-24031
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.
Vulnerability class: SQL Injection
EPSS: 0.004 (32.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@open-xchange.com (vendor-advisory, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-24031?
- CVE-2026-24031 is a high-severity vulnerability in Dovecot, classified under SQL Injection. CVSS score: 7.7/10. Published 2026-03-27.
- How severe is CVE-2026-24031?
- High severity. CVSS v3 base score is 7.7 out of 10.
- Is CVE-2026-24031 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.