CVE-2026-42395

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 a...

CVE-2026-42395

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 a...

CVE-2026-42395

CVE-2026-42395 affects Dovecot (OX Dovecot by Open-Xchange, per the advisory reference). A host listed as a trusted proxy can send forwarding information containing a NUL byte , which crashes the login process on the next login attempt, causing degradation or denial of service for logins. Deploym...

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 a...

CVE-2026-42395

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 a...

CVE-2026-42008

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

CVE-2026-42008

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

EUVD-2026-67673

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

CVE-2026-42008

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

CVE-2026-42008

CVE-2026-42008 is an authentication bypass in Dovecot (Open-Xchange fork) where forwarding information from a trusted proxy host is not kept separate from Dovecot's own authentication fields. A malicious or compromised trusted proxy host can inject an internal authentication field, allowing it to...

CVE-2026-42008: Improper Authentication

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

PT-2026-83066

Name of the Vulnerable Software and Affected Versions Dovecot affected versions not specified Description Information forwarded from a host configured as a trusted proxy is not properly isolated from internal authentication fields. This allows a trusted proxy to inject values into internal...

CVE-2026-42395

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 a...

CVE-2026-42008

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

UBUNTU-CVE-2026-42395

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 a...

CVE-2026-42395: Uncontrolled Resource Consumption

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 a...

PT-2026-83070

Name of the Vulnerable Software and Affected Versions dovecot versions prior to 2.4.5-1.1 Description A host configured as a trusted proxy can send forwarding information containing a NUL byte. This causes the login process to crash during the subsequent login attempt, leading to process...

UBUNTU-CVE-2026-42008

Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as any user without...

DEBIAN-CVE-2026-34959

Adminer 4.6.0 before 5.5.0 prepends the client-supplied X-Forwarded-Prefix header to $SERVER"REQUESTURI" with no trusted-proxy check and no validation of the prefix value. An attacker can supply an absolute URL e.g. X-Forwarded-Prefix: https://evil.example that flows into Location redirect header...

CVE-2026-76835

OAuth2 Proxy honours a client-supplied X-Forwarded-Uri header when deciding whether a request may skip authentication, because the guard added for CVE-2026-40575 is inert in the default reverse-proxy configuration. GetRequestURI in pkg/requests/util/util.go prefers that header over the real reque...