CVE-2026-34076

{
  "id": "CVE-2026-34076",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-01T18:16:29.527",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "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."
    },
    {
      "lang": "es",
      "value": "Clerk JavaScript es el repositorio oficial de JavaScript para la autenticación de Clerk. En @clerk/hono desde las versiones 0.1.0 hasta antes de la 0.1.5, @clerk/express desde las versiones 2.0.0 hasta antes de la 2.0.7, @clerk/backend desde las versiones 3.0.0 hasta antes de la 3.2.3, y @clerk/fastify desde las versiones 3.1.0 hasta antes de la 3.1.5, la función clerkFrontendApiProxy en @clerk/backend es vulnerable a la falsificación de petición del lado del servidor (SSRF). Un atacante no autenticado puede elaborar una ruta de petición que hace que el proxy envíe la Clerk-Secret-Key de la aplicación a un servidor controlado por el atacante. Este problema ha sido parcheado en @clerk/hono versión 0.1.5, @clerk/express versión 2.0.7, @clerk/backend versión 3.2.3, y @clerk/fastify versión 3.1.5."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "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"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-01T18:00:15.522839Z",
          "id": "CVE-2026-34076",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/clerk/javascript/security/advisories/GHSA-gjxx-92w9-8v8f",
      "source": "[email protected]"
    }
  ]
}