CVE-2026-27860
LOW
NVD
CVSS Score
3.7
Severity
LOW
Published
Mar 27, 2026
Vendor
unknown
Description
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.