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CVE-2026-63462

Estado: AplazadaAlta (7.5)—

Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the shared OpenAPI validation error path in src/lib/error/bad-data-error.ts passes a raw request value from lodash.get to JSON.stringify in genericErrorMessage and fromOpenApiValidationErrors without guarding stack exhaustion.

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An unauthenticated attacker can send a roughly 10 KB JSON value nested thousands of levels deep to POST /edge/validate, POST /edge/issue-token, or another OpenAPI-validated endpoint, causing RangeError: Maximum call stack size exceeded in openAPIValidationMiddleware and terminating the Node process because no uncaughtException handler recovers it. Replaying the request can sustain a complete service outage. This issue is fixed in versions 7.5.2, 7.6.5, and 8.0.2.

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 AV:N/PR:N/UI:N permite ataque remoto sin autenticación. CWE-674 (stack exhaustion) causa crash del proceso Node.js, cumpliendo DoS por consumo de recursos (T1499.004). Sin autenticación requerida → T1190.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

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

Unleash — UnleashAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-63462",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-63462",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-25T17:32:06.100866Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "Unleash",
          "product": "unleash",
          "versions": [
            {
              "status": "affected",
              "version": "< 7.5.2"
            },
            {
              "status": "affected",
              "version": ">= 7.6.0, < 7.6.5"
            },
            {
              "status": "affected",
              "version": ">= 8.0.0, < 8.0.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-08-21T19:17:31.927",
  "references": [
    {
      "url": "https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Unleash/unleash/releases/tag/v7.5.2",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Unleash/unleash/releases/tag/v7.6.5",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Unleash/unleash/releases/tag/v8.0.2",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the shared OpenAPI validation error path in src/lib/error/bad-data-error.ts passes a raw request value from lodash.get to JSON.stringify in genericErrorMessage and fromOpenApiValidationErrors without guarding stack exhaustion. An unauthenticated attacker can send a roughly 10 KB JSON value nested thousands of levels deep to POST /edge/validate, POST /edge/issue-token, or another OpenAPI-validated endpoint, causing RangeError: Maximum call stack size exceeded in openAPIValidationMiddleware and terminating the Node process because no uncaughtException handler recovers it. Replaying the request can sustain a complete service outage. This issue is fixed in versions 7.5.2, 7.6.5, and 8.0.2."
    }
  ],
  "lastModified": "2026-09-09T21:20:38.860",
  "sourceIdentifier": "security-advisories@github.com"
}