{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.1.5"
              },
              {
                "fixed": "2.0.7"
              },
              {
                "fixed": "3.2.3"
              },
              {
                "fixed": "3.1.5"
              }
            ],
            "source": "DESCRIPTION"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "784b50e622f8d203d337f7bd90948a54d19d87cd"
            },
            {
              "fixed": "759507d196353b2afa8bcfc46466b575c8953ae5"
            },
            {
              "fixed": "45701bd34eb12858780a747219fddf20dc0974a6"
            },
            {
              "fixed": "221a68441e722f677310ea7884f6eabddc825c99"
            }
          ],
          "repo": "https://github.com/clerk/javascript",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-gjxx-92w9-8v8f"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34076.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "@clerk/hono \u003e= 0.1.0, \u003c 0.1.5"
          },
          {
            "last_affected": "@clerk/hono \u003e= 0.1.0, \u003c 0.1.5"
          },
          {
            "introduced": "@clerk/express \u003e= 2.0.0, \u003c 2.0.7"
          },
          {
            "last_affected": "@clerk/express \u003e= 2.0.0, \u003c 2.0.7"
          },
          {
            "introduced": "@clerk/backend \u003e= 3.0.0, \u003c 3.2.3"
          },
          {
            "last_affected": "@clerk/backend \u003e= 3.0.0, \u003c 3.2.3"
          },
          {
            "introduced": "@clerk/fastify \u003e= 3.1.0, \u003c 3.1.5"
          },
          {
            "last_affected": "@clerk/fastify \u003e= 3.1.0, \u003c 3.1.5"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "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.",
  "id": "CVE-2026-34076",
  "modified": "2026-08-04T11:30:51.075175845Z",
  "published": "2026-04-01T16:59:21.828Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34076.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/clerk/javascript/security/advisories/GHSA-gjxx-92w9-8v8f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34076"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Clerk JavaScript: SSRF in the opt-in clerkFrontendApiProxy feature may leak secret keys to unintended host"
}