VDB
CVE-2026-42395
CVE-2026-42395
PUBLISHED
CVSS 4.3 MEDIUM
Reported by OX · Published August 28, 2026
A host listed as a trusted proxy can send forwarding information containing a NUL byte, which crashes the login process on the following login attempt. The login process is terminated, which can cause degradation or denial of service for logins. Deployments that do not configure trusted proxies are not affected. Restrict the list of trusted proxy networks to hosts that are fully under your control. Update to non-vulnerable version. No publicly available exploits are known.
Risk Scores
CVSS 3.1
4.3
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Open-Xchange GmbH | OX Dovecot Pro | 2.3.0, 3.0.0, 3.1.0 |
| Open-Xchange GmbH | OX Dovecot CE | 2.3.0 |
| alpine | dovecot | 0, 0, 0 |
| Open-Xchange GmbH | OX Dovecot CE | 2.3.0 |
| Open-Xchange GmbH | OX Dovecot Pro | 2.3.0, 3.0.0, 3.1.0 |
Timeline
- Aug 28, 2026 CVE Published
- Aug 29, 2026 EPSS Score
- Sep 2, 2026 Security Advisory
- Sep 3, 2026 CVE Updated
- Sep 12, 2026 EPSS Score
- Sep 17, 2026 EPSS Score
- Sep 24, 2026 EPSS Score
- Sep 26, 2026 EPSS Score
- Sep 29, 2026 EPSS Score
- Oct 1, 2026 EPSS Score
- Oct 5, 2026 EPSS Score
- Oct 6, 2026 EPSS Score