CVE-2026-42395

EUVD-2026-67677
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
ADJACENT_NETWORK
LOW
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 26.97%
Debian logo
Debian Releases
Debian Product
Codename
dovecot
bookworm
vulnerable
bookworm (security)
vulnerable
forky
1:2.4.5+dfsg1-2
fixed
sid
1:2.4.5+dfsg1-3
fixed
trixie
vulnerable
trixie (security)
1:2.4.1+dfsg1-6+deb13u7
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
dovecot
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
dovecot23
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
dovecot23-backend-mysql
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
dovecot23-backend-pgsql
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
dovecot23-backend-sqlite
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
dovecot23-devel
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
dovecot23-fts
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
dovecot23-fts-lucene
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
dovecot23-fts-solr
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
dovecot23-fts-squat
suse enterprise sap 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise sap 15 SP7
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP4
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP5
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP6
2.3.21.1-150200.76.1
fixed
suse enterprise server 15 SP7
2.3.21.1-150200.76.1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json