CVE-2026-24031

high CVSS 7.7 EPSS 0.4%

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.

Versions it affects

Software versions checked with the free lookup that CVE-2026-24031 applies to, and the release that fixes it where the sources name one.

Dovecot 2.2.36

At a glance

Severity: High
CVSS base score: 7.7 out of 10
Known exploited: Not in CISA's catalogue of exploited vulnerabilities
EPSS: 0.4% probability of exploitation in the next 30 days, higher than 34% of scored vulnerabilities
Weakness: CWE-89
Published: 2026-03-27

NVD CVE.org Advisory record

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