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CVE-2026-41248

Estado: AplazadaCrítica (9.1)—

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

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector CVSS N/A/L/N indica explotación remota sin privilegios (T1190). El bypass de createRouteMatcher permite saltar autenticación (T1078) y acceder a datos protegidos (T1005) sin credenciales válidas.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser TrainingUser Account Management

Tecnologías afectadas (4)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Clerk — AstroAIClerk — NextjsAIClerk — NuxtAIClerk — SharedAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-41248",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-41248",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-04-27T13:46:14.373183Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.1,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "clerk",
          "product": "astro",
          "versions": [
            {
              "status": "affected",
              "version": ">= 0.0.1, < 1.5.7"
            },
            {
              "status": "affected",
              "version": ">= 2.0.0-snapshot.v20241206174604, <= 2.17.9"
            },
            {
              "status": "affected",
              "version": ">= 3.0.0, < 3.0.15"
            }
          ]
        },
        {
          "vendor": "clerk",
          "product": "nextjs",
          "versions": [
            {
              "status": "affected",
              "version": ">= 5.0.0, < 5.7.6"
            },
            {
              "status": "affected",
              "version": ">= 6.0.0-snapshot.vb87a27f, < 6.39.2"
            },
            {
              "status": "affected",
              "version": ">= 7.0.0, < 7.2.1"
            }
          ]
        },
        {
          "vendor": "clerk",
          "product": "nuxt",
          "versions": [
            {
              "status": "affected",
              "version": ">= 1.1.0, < 1.13.28"
            },
            {
              "status": "affected",
              "version": ">= 2.0.0, < 2.2.2"
            }
          ]
        },
        {
          "vendor": "clerk",
          "product": "shared",
          "versions": [
            {
              "status": "affected",
              "version": ">= 2.20.17, < 2.22.1"
            },
            {
              "status": "affected",
              "version": ">= 3.0.0-canary.v20250225091530, < 3.47.4"
            },
            {
              "status": "affected",
              "version": ">= 4.0.0, < 4.8.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-04-24T21:16:18.497",
  "references": [
    {
      "url": "https://github.com/clerk/javascript/security/advisories/GHSA-vqx2-fgx2-5wq9",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-436"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "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"
    }
  ],
  "lastModified": "2026-06-17T10:46:23.023",
  "sourceIdentifier": "security-advisories@github.com"
}