Clerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host_CVE-2026-34076

{
    "lastseen": "",
    "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.",
    "published": "2026-04-01T16:59:21.828Z",
    "modified": "2026-04-01T18:00:23.118Z",
    "type": "cve",
    "title": "Clerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host",
    "source": "GitHub_M",
    "references": "https://github.com/clerk/javascript/security/advisories/GHSA-gjxx-92w9-8v8f",
    "id": "CVE-2026-34076",
    "bulletinFamily": "",
    "cwe": [
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "clerk javascript @clerk/hono >= 0.1.0, < 0.1.5\nclerk javascript @clerk/express >= 2.0.0, < 2.0.7\nclerk javascript @clerk/backend >= 3.0.0, < 3.2.3\nclerk javascript @clerk/fastify >= 3.1.0, < 3.1.5",
    "sourceHref": "",
    "cvss": {
        "score": 7.4,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
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        "privilegesRequired": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "javascript",
    "version": "@clerk/hono >= 0.1.0, < 0.1.5",
    "vendor": "clerk",
    "ai_description": "",
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    "ai_score": 0
}