CVE-2026-24031
Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin.
Published Mar 27, 2026 · updated Jul 15, 2026 · dovecot dovecot
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.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Mar 27, 2026 · NIST NVD
Detected
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.
Jul 15, 2026 · NIST NVD
Updated
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
- cpe dovecot/dovecotversion unspecified
- cpe open-xchange/dovecotversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-24031
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-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 publicl
nvd.nist.gov