{"id":"CVE-2026-34076","state":"PUBLISHED","title":"Clerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host","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.","publishedAt":"2026-04-01T16:59:21.828Z","updatedAt":"2026-04-01T18:00:23.118Z","severity":{"score":7.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["clerk javascript"],"affected":[{"vendor":"clerk","product":"javascript","versions":[{"version":"@clerk/hono >= 0.1.0, < 0.1.5","status":"affected"},{"version":"@clerk/express >= 2.0.0, < 2.0.7","status":"affected"},{"version":"@clerk/backend >= 3.0.0, < 3.2.3","status":"affected"},{"version":"@clerk/fastify >= 3.1.0, < 3.1.5","status":"affected"}]}],"references":["https://github.com/clerk/javascript/security/advisories/GHSA-gjxx-92w9-8v8f"],"weaknesses":["CWE-918"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34076.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34076","state":"PUBLISHED","datePublished":"2026-04-01T16:59:21.828Z","dateUpdated":"2026-04-01T18:00:23.118Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-25T16:21:40.868Z"},"containers":{"cna":{"title":"Clerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"clerk","product":"javascript","versions":[{"version":"@clerk/hono >= 0.1.0, < 0.1.5","status":"affected"},{"version":"@clerk/express >= 2.0.0, < 2.0.7","status":"affected"},{"version":"@clerk/backend >= 3.0.0, < 3.2.3","status":"affected"},{"version":"@clerk/fastify >= 3.1.0, < 3.1.5","status":"affected"}]}],"references":[{"url":"https://github.com/clerk/javascript/security/advisories/GHSA-gjxx-92w9-8v8f","name":"https://github.com/clerk/javascript/security/advisories/GHSA-gjxx-92w9-8v8f","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-01T16:59:21.828Z"},"source":{"advisory":"GHSA-gjxx-92w9-8v8f","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-01T18:00:15.522839Z","id":"CVE-2026-34076","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-01T18:00:23.118Z"}}]}}}