CVE-2026-33805

A flaw was found in @fastify/reply-from and @fastify/http-proxy. A remote attacker can exploit this vulnerability by manipulating the Connection header in client requests. This allows the attacker to remove specific headers that the proxy has added for security, routing, or access control purpose...

GHSA-GWHP-PF74-VJ37 Fastify's connection header abuse enables stripping of proxy-added headers

Summary @fastify/reply-from and @fastify/http-proxy process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers like access control or identification headers from upstream requests by...

Fastify's connection header abuse enables stripping of proxy-added headers

Summary @fastify/reply-from and @fastify/http-proxy process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers like access control or identification headers from upstream requests by...

CVE-2026-33805

@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them i...

HTTP Header Injection

Overview @fastify/reply-from is a forward your HTTP request to another server, for fastify Affected versions of this package are vulnerable to HTTP Header Injection via improper handling of the Connection header after proxy-added headers have been set. An attacker can remove headers intended for...

CVE-2026-33805 @fastify/reply-from vulnerable to connection header abuse enabling stripping of proxy-added headers

@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them i...

CVE-2026-33805 @fastify/reply-from vulnerable to connection header abuse enabling stripping of proxy-added headers

@fastify/reply-from v12.6.1 and earlier and @fastify/http-proxy v11.4.3 and earlier process the client's Connection header after the proxy has added its own headers via rewriteRequestHeaders. This allows attackers to retroactively strip proxy-added headers from upstream requests by listing them i...

CVE-2026-33805

CVE-2026-33805 affects @fastify/reply-from <= v12.6.1 and @fastify/http-proxy

PT-2026-33038

Name of the Vulnerable Software and Affected Versions @fastify/reply-from versions prior to 12.6.2 @fastify/http-proxy versions prior to 11.4.4 Description An issue exists where the client's Connection header is processed after the proxy has added its own headers via rewriteRequestHeaders. This...

fastify/reply-from和fastify/http-proxy 安全漏洞

fastify/reply-from and fastify/http-proxy are both products from the Fastify open-source project. fastify/reply-from is a plugin designed to forward incoming HTTP requests to another server. fastify/http-proxy is a full-featured HTTP proxy plugin that supports proxying WebSocket connections and...

Improper Access Control

fastify-reply-from is vulnerable to Improper Access Control. The vulnerability is due to insufficient validation of forwarded URLs in reply.from, which allows an attacker to craft malicious URLs and access unauthorized routes...

CVE-2025-66415

A flaw was found in fastify-reply-from. This vulnerability allows an attacker to bypass intended route restrictions and gain unauthorized access to specific application routes, potentially exposing sensitive information or functionality, via crafting a malicious Uniform Resource Locator URL...

GHSA-2Q7R-29RG-6M5H fastify-reply-from affected by bypass of reply forwarding

Summary By crafting a malicious URL, an attacker could access routes that are not allowed, even though the reply.from is defined for specific routes in @fastify/reply-from. Details An attacker can bypass the route defined by the @fastify/reply-from package by adding a .. symbol, which, for curl...

Directory Traversal

Overview @fastify/reply-from is a forward your HTTP request to another server, for fastify Affected versions of this package are vulnerable to Directory Traversal via the reply.from function. An attacker can access unauthorized routes by crafting a malicious URL containing encoded directory...

EUVD-2025-200117

fastify-reply-from affected by bypass of reply forwarding...

fastify-reply-from affected by bypass of reply forwarding

Summary By crafting a malicious URL, an attacker could access routes that are not allowed, even though the reply.from is defined for specific routes in @fastify/reply-from. Details An attacker can bypass the route defined by the @fastify/reply-from package by adding a .. symbol, which, for curl...

CVE-2025-66415

fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. Prior to 12.5.0, by crafting a malicious URL, an attacker could access routes that are not allowed, even though the reply.from is defined for specific routes in @fastify/reply-from. This vulnerability is...

CVE-2025-66415 fastify-reply-from bypass of reply forwarding

fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. Prior to 12.5.0, by crafting a malicious URL, an attacker could access routes that are not allowed, even though the reply.from is defined for specific routes in @fastify/reply-from. This vulnerability is...

CVE-2025-66415 fastify-reply-from bypass of reply forwarding

fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. Prior to 12.5.0, by crafting a malicious URL, an attacker could access routes that are not allowed, even though the reply.from is defined for specific routes in @fastify/reply-from. This vulnerability is...

CVE-2025-66415 fastify-reply-from bypass of reply forwarding

fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. Prior to 12.5.0, by crafting a malicious URL, an attacker could access routes that are not allowed, even though the reply.from is defined for specific routes in @fastify/reply-from. This vulnerability is...