Skip to main content
← All vulnerabilities
CVE-2026-34076GHSA-GJXX-92W9-8V8F

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 3.2.3, 2.0.7, 0.1.5, 3.1.5
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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 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. This issue has been patched in @clerk/hono version 0.1.5, @clerk/express version 2.0.7, @clerk/backend version 3.2.3, and @clerk/fastify version 3.1.5.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • clerk javascript

    Version range not reported

  • @clerk/backendnpm

    From 3.0.0 · fixed in 3.2.3

  • @clerk/expressnpm

    From 2.0.0 · fixed in 2.0.7

  • @clerk/hononpm

    From 0.1.0 · fixed in 0.1.5

  • @clerk/fastifynpm

    From 3.1.0 · fixed in 3.1.5

References 1

GitHub · clerk/javascript