Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-27860

If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This leads to potentially bypassing restrictions and allows probing of LDAP structure. Do not clear out auth_username_chars, or install fixed version. No publicly available exploits are known.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 11.9%
CVSS Severity
CVSS v3 Score 3.7
Products affected by CVE-2026-27860


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