Bug 2452181 (CVE-2026-24031) - CVE-2026-24031 dovecot: Dovecot: Authentication bypass and user enumeration due to cleared auth_username_chars configuration
Summary: CVE-2026-24031 dovecot: Dovecot: Authentication bypass and user enumeration d...
Keywords:
Status: NEW
Alias: CVE-2026-24031
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-27 09:02 UTC by OSIDB Bzimport
Modified: 2026-03-27 15:22 UTC (History)
0 users

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Description OSIDB Bzimport 2026-03-27 09:02:29 UTC 
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.
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