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CVE-2026-32726

Estado: AnalizadaAlta (8.1)—

SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.

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.

Red sin privilegios pero con autenticación (PR:L) permitida por bypass de autorización. Token manipulado otorga acceso indebido a recursos.

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 (1)

Scitokens — Scitokens CPP Library

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-32726",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-32726",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-31T18:39:24.642064Z"
        }
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    ],
    "cvssMetricV31": [
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        "source": "security-advisories@github.com",
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          "version": "3.1",
          "baseScore": 8.1,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 2.8
      }
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  "published": "2026-03-31T18:16:50.997",
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      "description": [
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          "value": "CWE-863"
        }
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1."
    },
    {
      "lang": "es",
      "value": "SciTokens C++ es una biblioteca mínima para crear y usar SciTokens desde C o C++. Antes de la versión 1.4.1, scitokens-cpp es vulnerable a un bypass de autorización en la validación de alcance basada en rutas. El aplicador utilizaba una simple comparación de prefijos de cadena al verificar si una ruta de recurso solicitada estaba cubierta por la ruta de alcance autorizada de un token. Dado que la verificación no requería un límite de segmento de ruta, un token con alcance a una ruta podía autorizar incorrectamente el acceso a rutas hermanas que simplemente comenzaban con el mismo prefijo. Este problema ha sido parcheado en la versión 1.4.1."
    }
  ],
  "lastModified": "2026-07-24T20:10:00.147",
  "configurations": [
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      "nodes": [
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          "cpeMatch": [
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