Host Validation Bypass

Apache Parquet is vulnerable to host validation bypass. The vulnerability is due to the pluggable KmsClient implementation not performing host validation for a file‑controlled KMS URL, where the URL from the Parquet file is forwarded without checks and a malicious actor can inject a hostile host,...

CVE-2026-73319

XenForo before 2.3.13 contains a cross-site scripting vulnerability in the dynamic redirect handler that allows unauthenticated attackers to execute arbitrary JavaScript in the board origin by crafting a malicious javascript: URI that bypasses host validation. Attackers can embed the board hostna...

CVE-2026-73319 XenForo < 2.3.13 XSS via Dynamic Redirect Handler

XenForo before 2.3.13 contains a cross-site scripting vulnerability in the dynamic redirect handler that allows unauthenticated attackers to execute arbitrary JavaScript in the board origin by crafting a malicious javascript: URI that bypasses host validation. Attackers can embed the board hostna...

PT-2026-87064

XenForo before 2.3.13 contains a cross-site scripting vulnerability in the dynamic redirect handler that allows unauthenticated attackers to execute arbitrary JavaScript in the board origin by crafting a malicious javascript: URI that bypasses host validation. Attackers can embed the board hostna...

EUVD-2026-52437

Litestar is an Asynchronous Server Gateway Interface ASGI framework. In versions prior to 2.22.0, an attacker can bypass the allowed hosts validation by omitting the Host header and supplying an X-Forwarded-Host header set to a whitelisted domain. The AllowedHostsMiddleware trusts the...

GHSA-MQHR-6J6H-74P5 Budibase: Unauthenticated REST Datasource Credential Theft via Cross-Origin Auth Leak

Summary Budibase attaches a REST datasource's stored credentials Bearer/Basic tokens and static headers to an outgoing request before it decides which host the request goes to, and never checks that the destination host matches the datasource. A query's request path can be pointed at any host via...

PYSEC-2026-2950 PraisonAI has an SSRF bypass

Summary The URL checking logic in PraisonAI has a logical flaw that could be bypassed by attackers, leading to SSRF attacks. Details The current PraisonAI project uses validateurl to validate the input URL. The main logic is to perform security checks on the host portion of the URL extracted by...

CVE-2026-53869

CVE-2026-53869 : Hermes Agent prior to 0.16.0 has a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. The FastAPI HTTP middleware is not executed for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events, ena...

CVE-2026-53869 Hermes Agent < 0.16.0 - DNS Rebinding Bypass via WebSocket Endpoints

Hermes Agent before 0.16.0 contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. FastAPI HTTP middleware does not execute for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events endpoints, enabling...

EUVD-2026-37774

Hermes Agent before 0.16.0 contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. FastAPI HTTP middleware does not execute for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events endpoints, enabling...

CVE-2026-53869 Hermes Agent < 0.16.0 - DNS Rebinding Bypass via WebSocket Endpoints

Hermes Agent before 0.16.0 contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. FastAPI HTTP middleware does not execute for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events endpoints, enabling...

Unintended Proxy or Intermediary ('Confused Deputy')

Overview org.webjars.npm:webpack-dev-server is an Uses webpack with a development server that provides live reloading. It should be used for development only. Affected versions of this package are vulnerable to Unintended Proxy or Intermediary 'Confused Deputy' via permissive user proxy...

CVE-2026-35253

Vulnerability in the Oracle Macoron Tool product of Oracle Open Source Projects. The supported versions that is affected is v0.22.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Macaron Tool. Successful attacks of this...

GHSA-6CF5-W9H3-4RQV Denied Host Validation Bypass in Zitadel Actions

Summary A flaw in the URL validation mechanism of Zitadel actions allows bypassing restrictions intended to block requests to localhost 127.0.0.1. The isHostBlocked check, designed to prevent such requests, can be circumvented by creating a DNS record that resolves to 127.0.0.1. This enables...

CVE-2024-49753 Denied Host Validation Bypass in Zitadel Actions

Zitadel is open-source identity infrastructure software. Versions prior to 2.64.1, 2.63.6, 2.62.8, 2.61.4, 2.60.4, 2.59.5, and 2.58.7 have a flaw in the URL validation mechanism of Zitadel actions allows bypassing restrictions intended to block requests to localhost 127.0.0.1. The isHostBlocked...

keycloak: redirect_uri validation bypass

A flaw was found in the redirecturi validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users...