CVE-2026-34076 Clerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host

Clerk JavaScript is the official JavaScript repository for Clerk authentication. In @clerk/hono from versions 0.1.0 to before 0.1.5, @clerk/express from versions 2.0.0 to before 2.0.7, @clerk/backend from versions 3.0.0 to before 3.2.3, and @clerk/fastify from versions 3.1.0 to before 3.1.5, the...

Server-side Request Forgery (SSRF)

Overview @clerk/backend is a Clerk Backend SDK - REST Client for Backend API & JWT verification utilities Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the clerkFrontendApiProxy function. An attacker can obtain secret keys by crafting a request path that...

GHSA-GJXX-92W9-8V8F Clerk: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host

Summary The clerkFrontendApiProxy function in @clerk/backend is vulnerable to Server-Side Request Forgery SSRF. An unauthenticated attacker can craft a request path that causes the proxy to send the application's Clerk-Secret-Key to an attacker-controlled server. Affected packages Only applicatio...

PT-2026-28602

Summary The clerkFrontendApiProxy function in @clerk/backend is vulnerable to Server-Side Request Forgery SSRF. An unauthenticated attacker can craft a request path that causes the proxy to send the application's Clerk-Secret-Key to an attacker-controlled server. Affected packages Only applicatio...