io.netty/netty-handler: Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext

A flaw was found in Netty, an asynchronous, event-driven network application framework. An unauthenticated remote attacker can exploit fragmented Transport Layer Security TLS ClientHello messages to bypass the Server Name Indication SNI routing mechanism. This forces a fallback to a less secure...

Security Bulletin: IBM SPSS Analytic Server is affected by multiple vulnerabilities in Netty

Summary IBM SPSS Analytic Server is affected by multiple vulnerabilities in Netty. This has been addressed in the remediation section. Vulnerability Details CVEID:CVE-2026-75595 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and...

EUVD-2026-63095

Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext...

CVE-2026-15576: Missing Authentication for Critical Function

Improper authentication in the agent receiver of Checkmk 2.5.0p10 allows an unauthenticated remote attacker to bypass mutual TLS client certificate verification of relay endpoints by supplying a fixed placeholder identity in the request URL, resulting in limited impact on integrity and...

CVE-2026-75595

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...

UBUNTU-CVE-2026-75595

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...

CVE-2026-75595

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...

CVE-2026-75595

Netty (asynchronous, event-driven network framework) is affected by an SNI routing bypass in io.netty.handler.ssl.SslClientHelloHandler#decode . The method checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records triggers an ...

CVE-2026-75595: Improper Check for Unusual or Exceptional Conditions

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.handler.ssl.SslClientHelloHandlerdecode checks the wrong offset before reading the four-byte TLS handshake header, so a ClientHello whose handshake header spans records can cause...

aap-gateway: missing requestHeadersToRemove allows mTLS bypass via Subject header spoofing

A flaw was found in the AAP Gateway Envoy proxy configuration. The non-mTLS route to EDA event streams does not remove the Subject HTTP header from client requests, despite the source code defining requestHeadersToRemove for this header. An unauthenticated remote attacker can inject a spoofed...

CVE-2026-12382

The CVE-2026-12382 issue affects the AAP Gateway Envoy proxy. The non-mTLS route to EDA event streams fails to remove the Subject header despite requestHeadersToRemove, allowing an unauthenticated attacker to spoof a Subject header that matches a legitimate client certificate DN and bypass mTLS t...

CVE-2026-53622

Traefik is an HTTP reverse proxy and load balancer. Versions prior to 3.7.3, 3.6.18, and 2.11.51 have a critical vulnerability in Traefik's HTTP/3 QUIC TLS configuration selection that allows unauthenticated clients to bypass router-specific mTLS enforcement. When HTTP/3 is enabled on an...

CVE-2026-48491 Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass

Traefik is an HTTP reverse proxy and load balancer. From 3.7.0 until 3.7.3, there is a high severity vulnerability in Traefik's domain-fronting protection SNICheck that allows an unauthenticated client to bypass mutual TLS enforced through wildcard router TLSOptions. When a router uses a wildcard...

EUVD-2026-38575

Traefik is an HTTP reverse proxy and load balancer. From 3.7.0 until 3.7.3, there is a high severity vulnerability in Traefik's domain-fronting protection SNICheck that allows an unauthenticated client to bypass mutual TLS enforced through wildcard router TLSOptions. When a router uses a wildcard...

CVE-2026-48491 Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass

Traefik is an HTTP reverse proxy and load balancer. From 3.7.0 until 3.7.3, there is a high severity vulnerability in Traefik's domain-fronting protection SNICheck that allows an unauthenticated client to bypass mutual TLS enforced through wildcard router TLSOptions. When a router uses a wildcard...

CVE-2026-48491

CVE-2026-48491 (Traefik) describes a high-severity vulnerability in Traefik 3.7.0–3.7.3 where SNICheck ignores wildcard TLSOptions mappings. An unauthenticated client can complete a TLS handshake with a permissive SNI on the same entrypoint and then send a Host header targeting a wildcard-protect...

CVE-2026-48491: Authentication Bypass Using an Alternate Path or Channel

Traefik is an HTTP reverse proxy and load balancer. From 3.7.0 until 3.7.3, there is a high severity vulnerability in Traefik's domain-fronting protection SNICheck that allows an unauthenticated client to bypass mutual TLS enforced through wildcard router TLSOptions. When a router uses a wildcard...

Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass

Summary There is a high severity vulnerability in Traefik's domain-fronting protection SNICheck that allows an unauthenticated client to bypass mutual TLS enforced through wildcard router TLSOptions. When a router uses a wildcard host rule such as Host.example.com with stricter TLS options for...

EUVD-2026-33274

A flaw was found in the OpenShift Router. When a Route has insecureEdgeTerminationPolicy set to Allow, the HTTP frontend does not remove X-SSL-Client- headers from incoming requests. This allows an unauthenticated attacker to send plain HTTP requests with crafted X-SSL-Client- headers. As a resul...

CVE-2026-46579

A flaw was found in the OpenShift Router. When a Route has insecureEdgeTerminationPolicy set to Allow, the HTTP frontend does not remove X-SSL-Client- headers from incoming requests. This allows an unauthenticated attacker to send plain HTTP requests with crafted X-SSL-Client- headers. As a resul...