SSRF in Clerk Javascript
CVE-2026-34076
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, an…
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.000 (7.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Clerk Javascript — versions @clerk/hono >= 0.1.0, < 0.1.5, @clerk/express >= 2.0.0, < 2.0.7, @clerk/backend >= 3.0.0, < 3.2.3
Weakness classification (CWE)
References
- https://github.com/clerk/javascript/security/advisories/GHSA-gjxx-92w9-8v8f (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-34076?
- CVE-2026-34076 is a high-severity vulnerability in Clerk Javascript, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.4/10. Published 2026-04-01.
- How severe is CVE-2026-34076?
- High severity. CVSS v3 base score is 7.4 out of 10.