@clerk/fastify (npm) — known CVEs & security advisories

Known CVE vulnerabilities and GitHub Security Advisories affecting the npm package @clerk/fastify, with affected version ranges, CVSS severity, EPSS exploit prediction, and CISA KEV status.

CVEs (3)

• CVE-2026-42349 — CVSS 8.1 (high): Clerk JavaScript is the official JavaScript repository for Clerk authentication. has(), auth.protect(), and related authorization…
• CVE-2025-53548 — CVSS 7.5 (high): Clerk helps developers build user management. Applications that use the verifyWebhook() helper to verify incoming Clerk webhooks are…
• CVE-2026-34076 — CVSS 7.4 (high): Clerk JavaScript is the official JavaScript repository for Clerk authentication. In @clerk/hono from versions 0.1.0 to before 0.1.5…