FKIE_CVE-2026-41164

Vulnerability from fkie_nvd - Published: 2026-05-26 18:16 - Updated: 2026-07-24 11:10
Severity
4.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
nuts-node is the reference implementation of the Nuts specification. Prior to 6.2.3 and 5.4.31, the v1 access token introspection endpoint (/auth/v1/introspect_access_token) accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims. This allows a Verifiable Presentation (VP) JWT to be replayed as an access token and receive an active: true introspection response. This vulnerability is fixed in 6.2.3 and 5.4.31.
References
security-advisories@github.comhttps://github.com/nuts-foundation/nuts-node/security/advisories/GHSA-9hmg-827w-9rhj
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "nuts-node",
          "vendor": "nuts-foundation",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 6.0.0-alpha.1, \u003c 6.2.3"
            },
            {
              "status": "affected",
              "version": "\u003c 5.4.31"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "nuts-node is the reference implementation of the Nuts specification. Prior to 6.2.3 and 5.4.31, the v1 access token introspection endpoint (/auth/v1/introspect_access_token) accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims. This allows a Verifiable Presentation (VP) JWT to be replayed as an access token and receive an active: true introspection response. This vulnerability is fixed in 6.2.3 and 5.4.31."
    },
    {
      "lang": "es",
      "value": "nuts-node es la implementaci\u00f3n de referencia de la especificaci\u00f3n Nuts. Antes de las versiones 6.2.3 y 5.4.31, el endpoint de introspecci\u00f3n de tokens de acceso v1 (/auth/v1/introspect_access_token) acepta cualquier JWT firmado por una clave presente en el nodo, sin validar el tipo de JWT, la vinculaci\u00f3n emisor-a-clave o las claims requeridas. Esto permite que un JWT de Presentaci\u00f3n Verificable (VP) sea reutilizado como un token de acceso y reciba una respuesta de introspecci\u00f3n active: true. Esta vulnerabilidad est\u00e1 corregida en las versiones 6.2.3 y 5.4.31."
    }
  ],
  "id": "CVE-2026-41164",
  "lastModified": "2026-07-24T11:10:00.170",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 2.7,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-41164",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-27T17:24:32.828628Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-26T18:16:47.683",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nuts-foundation/nuts-node/security/advisories/GHSA-9hmg-827w-9rhj"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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