CVE-2026-27860
MEDIUM5.3EPSS 0.04%Published: 3/27/2026Modified: 4/30/2026
Also known as:ALPINE-CVE-2026-27860DEBIAN-CVE-2026-27860
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.
Affected packages (2)
- Alpine/dovecotfrom 0, < 2.4.3-r0
- Debian/dovecotfrom 0, < 1:2.4.1+dfsg1-6+deb13u4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |