Litestar: AllowedHostsMiddleware bypasses host validation via client-controlled X-Forwarded-Host header

Summary AllowedHostsMiddleware trusts the X-Forwarded-Host header as a fallback when the Host header is absent. Since X-Forwarded-Host is a client-controllable header, an attacker can bypass the allowed hosts validation by omitting the Host header and supplying an X-Forwarded-Host header set to a...

PT-2026-48543

Name of the Vulnerable Software and Affected Versions Litestar version 3.0.0b0 Description AllowedHostsMiddleware trusts the X-Forwarded-Host header as a fallback when the Host header is absent. Because X-Forwarded-Host is client-controllable, an attacker can bypass allowed hosts validation by...

CVE-2026-9739

Vulnerable to DNS rebinding attacks when using SSE http://b/499408790. During the beta phase, we implemented allowed-origins and allowed-hosts flags to align with MCP security guidelines. However, the hardcoded Access-Control-Allow-Origin: header in the SSE initialization handler was inadvertentl...

Kibana 9.3.3 Security Update (ESA-2026-40)

Server-Side Request Forgery SSRF in Kibana Leading to Unauthorized Network Access Server-Side Request Forgery CWE-918 in Kibana can allow an authenticated user with connector management privileges to bypass the operator-configured connector allowlist, causing the Kibana server to issue outbound...

Kibana 9.2.8, and 9.3.2 Security Update (ESA-2026-37)

Server-Side Request Forgery SSRF in Kibana Leading to Unauthorized Network Access Server-Side Request Forgery CWE-918 in Kibana allows authenticated users with connector management privileges to bypass the operator-configured connection allowlist. By configuring a Webhook connector with a crafted...

MCP Toolbox for Databases vulnerable to DNS rebinding attacks

Vulnerable to DNS rebinding attacks when using SSE http://b/499408790. During the beta phase, we implemented allowed-origins and allowed-hosts flags to align with MCP security guidelines. However, the hardcoded Access-Control-Allow-Origin: header in the SSE initialization handler was inadvertentl...

PT-2026-55107

Vulnerable to DNS rebinding attacks when using SSE http://b/499408790. During the beta phase, we implemented allowed-origins and allowed-hosts flags to align with MCP security guidelines. However, the hardcoded Access-Control-Allow-Origin: header in the SSE initialization handler was inadvertentl...

CVE-2026-9739

Vulnerable to DNS rebinding attacks when using SSE http://b/499408790. During the beta phase, we implemented allowed-origins and allowed-hosts flags to align with MCP security guidelines. However, the hardcoded Access-Control-Allow-Origin: header in the SSE initialization handler was inadvertentl...

Symfony has an HtmlSanitizer allowLinkHosts() / allowMediaHosts() Bypass via URL-Parser Differentials and <area> Misclassification

Description symfony/html-sanitizer lets applications sanitise untrusted HTML. The configuration methods allowLinkHosts... and allowLinkSchemes... are intended to restrict targets to an allowlist of hosts/schemes; allowMediaHosts / allowMediaSchemes do the same for etc. Three distinct bypasses all...

PT-2026-44123

Name of the Vulnerable Software and Affected Versions Toolbox affected versions not specified Description The software is susceptible to DNS rebinding attacks when using Server-Sent Events SSE under specification v2024-11-05. This occurs because the SSE initialization handler retains a hardcoded...

Nautobot: Webhook definitions could be used for server-side request forgery (SSRF)

Impact Nautobot's Webhook data model and associated feature set could be configured by users with sufficient access to perform requests to various hosts and IP addresses that should not be permitted, allowing for various behaviors similar to server-side request forgery SSRF. Patches Fixes are...

PT-2026-40719

Name of the Vulnerable Software and Affected Versions Nautobot versions prior to 2.4.33 Nautobot versions prior to 3.1.2 Description The Webhook data model and associated feature set can be configured by users with sufficient access to perform requests to unauthorized hosts and IP addresses. This...

RUSTSEC-2026-0140 DNS rebinding and cross-origin CSRF in dynoxide's MCP HTTP transport

dynoxide's MCP HTTP transport was vulnerable to DNS rebinding via its transitive rmcp dependency, plus a related cross-origin CSRF gap. A malicious web page could make the user's browser send requests to a local dynoxide mcp --http or dynoxide serve --mcp server with a non-loopback Host header,...

CVE-2026-33149

Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. Versions up to and including 2.5.3 set ALLOWEDHOSTS = '' by default, which causes Django to accept any value in the HTTP Host header without validation. The application uses request.buildabsoluteu...

CVE-2026-33149 Tandoor Recipes Vulnerable to Host Header Injection

Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. Versions up to and including 2.5.3 set ALLOWEDHOSTS = '' by default, which causes Django to accept any value in the HTTP Host header without validation. The application uses request.buildabsoluteu...

CVE-2026-33149 Tandoor Recipes Vulnerable to Host Header Injection

Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. Versions up to and including 2.5.3 set ALLOWEDHOSTS = '' by default, which causes Django to accept any value in the HTTP Host header without validation. The application uses request.buildabsoluteu...

EUVD-2026-16313

Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. Versions up to and including 2.5.3 set ALLOWEDHOSTS = '' by default, which causes Django to accept any value in the HTTP Host header without validation. The application uses request.buildabsoluteu...

Tandoor Recipes 安全漏洞

Tandoor Recipes is an open-source application designed for managing recipes, planning meals, creating shopping lists, and more. Versions of Tandoor Recipes 2.5.3 and earlier contained security vulnerabilities. These vulnerabilities stemmed from the default setting ALLOWEDHOSTS = , which could all...

PT-2026-28470

Name of the Vulnerable Software and Affected Versions Tandoor Recipes versions up to and including 2.5.3 Description Tandoor Recipes is an application for managing recipes, planning meals, and building shopping lists. Versions up to and including 2.5.3 set ALLOWED HOSTS = '' by default, which...

CVE-2026-33393

Discourse contains a vulnerability in the spam protection check for allowed_spam_host_domains. Before versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the check used String#end_with? without domain boundary validation, permitting a suffix-bypass such as attacker-example.com when example.com wa...