FKIE_CVE-2026-41248

Vulnerability from fkie_nvd - Published: 2026-04-24 21:16 - Updated: 2026-10-26 21:10
Severity
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
Clerk JavaScript is the official JavaScript repository for Clerk authentication. createRouteMatcher in @clerk/nextjs, @clerk/nuxt, and @clerk/astro can be bypassed by certain crafted requests, allowing them to skip middleware gating and reach downstream handlers. This vulnerability is fixed in @clerk/astro 1.5.7, 2.17.10, and 3.0.15; @clerk/nextjs 5.7.6, 6.39.2, and 7.2.1; @clerk/nuxt 1.13.28 and 2.2.2; and @clerk/shared 2.22.1, 3.47.4, anc 4.8.1
References
security-advisories@github.comhttps://github.com/clerk/javascript/security/advisories/GHSA-vqx2-fgx2-5wq9
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "astro",
          "vendor": "clerk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.0.1, \u003c 1.5.7"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0-snapshot.v20241206174604, \u003c= 2.17.9"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0, \u003c 3.0.15"
            }
          ]
        },
        {
          "product": "nextjs",
          "vendor": "clerk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.7.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0-snapshot.vb87a27f, \u003c 6.39.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.0.0, \u003c 7.2.1"
            }
          ]
        },
        {
          "product": "nuxt",
          "vendor": "clerk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.1.0, \u003c 1.13.28"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 2.2.2"
            }
          ]
        },
        {
          "product": "shared",
          "vendor": "clerk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.20.17, \u003c 2.22.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0-canary.v20250225091530, \u003c 3.47.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0, \u003c 4.8.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Clerk JavaScript is the official JavaScript repository for Clerk authentication. createRouteMatcher in @clerk/nextjs, @clerk/nuxt, and @clerk/astro can be bypassed by certain crafted requests, allowing them to skip middleware gating and reach downstream handlers. This vulnerability is fixed in @clerk/astro 1.5.7, 2.17.10, and 3.0.15; @clerk/nextjs 5.7.6, 6.39.2, and 7.2.1; @clerk/nuxt 1.13.28 and 2.2.2; and @clerk/shared 2.22.1, 3.47.4, anc 4.8.1"
    },
    {
      "lang": "es",
      "value": "Clerk JavaScript es el repositorio oficial de JavaScript para la autenticaci\u00f3n de Clerk. createRouteMatcher en @clerk/nextjs, @clerk/nuxt y @clerk/astro puede ser eludido por ciertas solicitudes manipuladas, permiti\u00e9ndoles omitir el control del middleware y alcanzar los manejadores posteriores. Esta vulnerabilidad est\u00e1 corregida en @clerk/astro 1.5.7, 2.17.10 y 3.0.15; @clerk/nextjs 5.7.6, 6.39.2 y 7.2.1; @clerk/nuxt 1.13.28 y 2.2.2; y @clerk/shared 2.22.1, 3.47.4 y 4.8.1."
    }
  ],
  "id": "CVE-2026-41248",
  "lastModified": "2026-10-26T21:10:00.170",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-41248",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-27T13:46:14.373183Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-24T21:16:18.497",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/clerk/javascript/security/advisories/GHSA-vqx2-fgx2-5wq9"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-436"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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