GHSA-6HW5-45GM-FJ88 @fastify/express has a middleware authentication bypass via URL normalization gaps (duplicate slashes and semicolons)

Summary @fastify/express v4.0.4 fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows complete bypass of path-scoped authentication middleware via two vectors: 1. Duplicate slashes //admin/dashboard when...

PT-2026-33323

Name of the Vulnerable Software and Affected Versions @fastify/middie versions prior to 9.3.2 Description A middleware bypass exists when the deprecated ignoreDuplicateSlashes option is enabled. The middleware path matching logic fails to account for duplicate slash normalization performed by the...

@fastify/middie 安全漏洞

@fastify/middie is an open-source middleware engine developed by Fastify. Versions of @fastify/middie 9.3.1 and earlier contained security vulnerabilities. These vulnerabilities occurred when the deprecated ignoreDuplicateSlashes option was enabled, as the middleware’s path matching logic did not...

Interpretation Conflict

Overview @fastify/express is an Express compatibility layer for Fastify Affected versions of this package are vulnerable to Interpretation Conflict via improper URL normalization gaps. An attacker can gain unauthorized access to protected routes by manipulating the URL path with duplicate slashes...

CVE-2026-33808

CVE-2026-33808 affects fastify/express. Root cause: @fastify/express v4.0.4 and earlier fail to normalize URLs before passing to Express middleware when Fastify router normalization is enabled, allowing bypass of path-scoped authentication via duplicate slashes or semicolon delimiters. Outcome: a...

CVE-2026-33808 @fastify/express vulnerable to middleware authentication bypass via URL normalization gaps (duplicate slashes and semicolons)

Impact@fastify/express v4.0.4 and earlier fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows complete bypass of path-scoped authentication middleware via duplicate slashes when ignoreDuplicateSlashes is enabled, or...

CVE-2026-33808

Impact@fastify/express v4.0.4 and earlier fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows complete bypass of path-scoped authentication middleware via duplicate slashes when ignoreDuplicateSlashes is enabled, or...

CVE-2026-33808 @fastify/express vulnerable to middleware authentication bypass via URL normalization gaps (duplicate slashes and semicolons)

Impact@fastify/express v4.0.4 and earlier fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows complete bypass of path-scoped authentication middleware via duplicate slashes when ignoreDuplicateSlashes is enabled, or...

CVE-2026-33808 @fastify/express vulnerable to middleware authentication bypass via URL normalization gaps (duplicate slashes and semicolons)

Impact@fastify/express v4.0.4 and earlier fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows complete bypass of path-scoped authentication middleware via duplicate slashes when ignoreDuplicateSlashes is enabled, or...

CVE-2026-33808: Interpretation Conflict

Impact@fastify/express v4.0.4 and earlier fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows complete bypass of path-scoped authentication middleware via duplicate slashes when ignoreDuplicateSlashes is enabled, or...

PT-2026-33035

Name of the Vulnerable Software and Affected Versions @fastify/express versions prior to 4.0.5 Description An issue exists where the software fails to normalize URLs before passing them to Express middleware when Fastify router normalization options are enabled. This allows an unauthenticated...

CVE-2026-39407

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes // in the request path. When route-based middleware e.g., /admin/ is used for...

CVE-2026-39406

@hono/node-server allows running the Hono application on Node.js. Prior to 1.19.13, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes // in the request path. When route-based middleware e.g., /admin/ is used for authorization, the...

CVE-2026-39407

Hono (Web framework) prior to 4.12.12 is affected by a path handling inconsistency in serveStatic: repeated slashes in the request path can bypass route-based middleware (e.g., /admin/*) and expose protected static files. The issue arises because the router may not match paths with // while serve...

CVE-2026-39407 Hono has a middleware bypass via repeated slashes in serveStatic

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes // in the request path. When route-based middleware e.g., /admin/ is used for...

CVE-2026-39407 Hono has a middleware bypass via repeated slashes in serveStatic

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes // in the request path. When route-based middleware e.g., /admin/ is used for...

CVE-2026-39407 Hono has a middleware bypass via repeated slashes in serveStatic

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes // in the request path. When route-based middleware e.g., /admin/ is used for...

CVE-2026-39407

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes // in the request path. When route-based middleware e.g., /admin/ is used for...

CVE-2026-39406 @hono/node-server has a middleware bypass via repeated slashes in serveStatic

@hono/node-server allows running the Hono application on Node.js. Prior to 1.19.13, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes // in the request path. When route-based middleware e.g., /admin/ is used for authorization, the...

CVE-2026-39406 @hono/node-server has a middleware bypass via repeated slashes in serveStatic

@hono/node-server allows running the Hono application on Node.js. Prior to 1.19.13, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes // in the request path. When route-based middleware e.g., /admin/ is used for authorization, the...