CVE-2026-27856
EUVD-2026-1656527.03.2026, 09:16
Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential will lead into full access to the affected component. Limit access to the doveadm http service port, install fixed version. No publicly available exploits are known.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| dovecot | dovecot | 𝑥 < 2.4.3 |
| open-xchange | dovecot | 𝑥 < 2.3.22.1 |
| open-xchange | dovecot | 3.0.0 ≤ 𝑥 < 3.0.5 |
| open-xchange | dovecot | 3.1.0 ≤ 𝑥 < 3.1.4 |
𝑥
= Vulnerable software versions
Debian Releases
Ubuntu Releases
openSUSE / SLES Releases
openSUSE Product | |||||
|---|---|---|---|---|---|
| dovecot22 |
| ||||
| dovecot22-backend-mysql |
| ||||
| dovecot22-backend-pgsql |
| ||||
| dovecot22-backend-sqlite |
| ||||
| dovecot22-devel |
|
Common Weakness Enumeration
Vulnerability Media Exposure