{"cve":"CVE-2026-34076","nvd":{"published":"2026-04-01T18:16:29.527","modified":"2026-10-26T22:10:00.163","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4},"cwes":["CWE-918"],"references":["https://github.com/clerk/javascript/security/advisories/GHSA-gjxx-92w9-8v8f"],"products":[],"source":"nvd","synced_at":"2026-10-26T22:26:44.656832877+00:00"},"epss":{"cve":"CVE-2026-34076","score":0.00309,"percentile":0.23504,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-gjxx-92w9-8v8f","url":"https://osv.dev/vulnerability/GHSA-gjxx-92w9-8v8f","summary":"Clerk: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host","modified":"2026-04-06T17:04:07.972168Z","packages":[{"ecosystem":"npm","name":"@clerk/backend","purl":"pkg:npm/%40clerk/backend","ranges":[">=3.0.0 <3.2.3"],"fixed":["3.2.3"]},{"ecosystem":"npm","name":"@clerk/express","purl":"pkg:npm/%40clerk/express","ranges":[">=2.0.0 <2.0.7"],"fixed":["2.0.7"]},{"ecosystem":"npm","name":"@clerk/hono","purl":"pkg:npm/%40clerk/hono","ranges":[">=0.1.0 <0.1.5"],"fixed":["0.1.5"]},{"ecosystem":"npm","name":"@clerk/fastify","purl":"pkg:npm/%40clerk/fastify","ranges":[">=3.1.0 <3.1.5"],"fixed":["3.1.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}