EUVD-2026-21061

Apollo MCP Server is a Model Context Protocol server that exposes GraphQL operations as MCP tools. Prior to version 1.7.0, the Apollo MCP Server did not validate the Host header on incoming HTTP requests when using StreamableHTTP transport. In configurations where an HTTP-based MCP server is run ...

CVE-2026-35577

Apollo MCP Server is a Model Context Protocol server that exposes GraphQL operations as MCP tools. Prior to version 1.7.0, the Apollo MCP Server did not validate the Host header on incoming HTTP requests when using StreamableHTTP transport. In configurations where an HTTP-based MCP server is run ...

CVE-2026-35577

CVE-2026-35577 affects Apollo MCP Server (GraphQL/MCP) prior to v1.7.0 where Host header validation was missing for HTTP StreamableHTTP transport. This could allow a local user running the MCP server on localhost to be influenced by a malicious site via DNS rebinding, bypassing same-origin policy...

CVE-2026-35577 Missing Host Header Validation in Apollo MCP Server for Localhost Deployments

Apollo MCP Server is a Model Context Protocol server that exposes GraphQL operations as MCP tools. Prior to version 1.7.0, the Apollo MCP Server did not validate the Host header on incoming HTTP requests when using StreamableHTTP transport. In configurations where an HTTP-based MCP server is run ...

Security Bulletin: Improper Host Header Validation in Undertow HTTP Server Enables Cache Poisoning and Session Hijacking affects watsonx.data

Summary A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications. The Undertow library fails to properly validate the Host header in incoming HTTP requests.As a result, requests containing malformed or malicious Host headers are processed...

PT-2026-31715

Apollo MCP Server is a Model Context Protocol server that exposes GraphQL operations as MCP tools. Prior to version 1.7.0, the Apollo MCP Server did not validate the Host header on incoming HTTP requests when using StreamableHTTP transport. In configurations where an HTTP-based MCP server is run ...

Apollo MCP Server 访问控制错误漏洞

The Apollo MCP Server is an open-source service from Apollo GraphQL that exposes GraphQL operations as AI tools. Versions of the Apollo MCP Server prior to 1.7.0 contained a access control vulnerability. This vulnerability stemmed from the lack of validation of the Host header in incoming HTTP...

Origin Validation Error

Overview Affected versions of this package are vulnerable to Origin Validation Error through the lack CORS checks Host and Origin header validation on incoming HTTP connections. An attacker can gain unauthorized access to local or private-network servers by tricking a victim into visiting a...

Security Bulletin: IBM App Connect Enterprise Certified Container DesignerAuthoring operands are vulnerable to loss of confidentiality (CVE-2026-27959)

Summary Node.js module Koa is used by IBM App Connect Enterprise Certified Container. IBM App Connect Enterprise Certified Container DesignerAuthoring operands are vulnerable to loss of confidentiality. This bulletin provides patch information to address the reported vulnerability in Node.js modu...

CVE-2026-35507

Shynet before 0.14.0 allows Host header injection in the password reset flow...

Linux Distros Unpatched Vulnerability : CVE-2026-34835

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Request parses the Host header using a...

SUSE CVE-2026-34835

Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Request parses the Host header using an AUTHORITY regular expression that accepts characters not permitted in RFC-compliant hostnames, including /, ?, , and @. Because req.hos...

EUVD-2026-18376

Signal K Server: OAuth Authorization Code Theft via Unvalidated Host Header in OIDC Flow...

Origin Validation Error

Overview signalk-server is an An implementation of a Signal K server for boats. Affected versions of this package are vulnerable to Origin Validation Error via the construction of the redirectUri and fullPostLogoutUri using an unvalidated Host header in the OIDC authentication and logout processe...

GHSA-CXJ8-GGF2-P57C Signal K Server: OAuth Authorization Code Theft via Unvalidated Host Header in OIDC Flow

Summary SignalK Server contains a code-level vulnerability in its OIDC login and logout handlers where the unvalidated HTTP Host header is used to construct the OAuth2 redirecturi. Because the redirectUri configuration is silently unset by default, an attacker spoof the Host header to steal OAuth...

Signal K Server: OAuth Authorization Code Theft via Unvalidated Host Header in OIDC Flow

Summary SignalK Server contains a code-level vulnerability in its OIDC login and logout handlers where the unvalidated HTTP Host header is used to construct the OAuth2 redirecturi. Because the redirectUri configuration is silently unset by default, an attacker spoof the Host header to steal OAuth...

CVE-2026-34835

A flaw was found in Rack. A remote attacker could exploit this by sending a specially crafted Host header containing characters not permitted in standard hostnames. This malformed header bypasses hostname validation in applications using Rack::Request, leading to host header poisoning. This can...

CVE-2026-34083

Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0, SignalK Server contains a code-level vulnerability in its OIDC login and logout handlers where the unvalidated HTTP Host header is used to construct the OAuth2 redirecturi. Because the redirectU...

CLSA-2026-1775220180 nodejs: Fix of CVE-2023-45143

CVE-2023-45143: fix cookie and host header leak on cross-origin redirect in undici...

CVE-2025-66485

IBM Aspera Shares 1.9.9 through 1.11.0 is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking...