Medium severity4.3NVD Advisory· Published Aug 28, 2026· Updated Sep 3, 2026
CVE-2026-42395
CVE-2026-42395
Description
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.
Affected products
3- osv-coords2 versionspkg:rpm/opensuse/dovecot24&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/dovecot24&distro=openSUSE%20Tumbleweed
< 2.4.4-160000.2.1+ 1 more
- (no CPE)range: < 2.4.4-160000.2.1
- (no CPE)range: < 2.4.5-1.1
Patches
Vulnerability mechanics
References
1News mentions
1- Dovecot: 17 Vulnerabilities Including Critical Flaws Disclosed Together on August 28, 2026Vypr Intelligence · Aug 28, 2026