FKIE_CVE-2026-63462

Vulnerability from fkie_nvd - Published: 2026-08-21 19:17 - Updated: 2026-08-21 19:17
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
security-advisories@github.comhttps://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf
security-advisories@github.comhttps://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1
security-advisories@github.comhttps://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d
security-advisories@github.comhttps://github.com/Unleash/unleash/releases/tag/v7.5.2
security-advisories@github.comhttps://github.com/Unleash/unleash/releases/tag/v7.6.5
security-advisories@github.comhttps://github.com/Unleash/unleash/releases/tag/v8.0.2
security-advisories@github.comhttps://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "unleash",
          "vendor": "Unleash",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.5.2"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.6.0, \u003c 7.6.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0, \u003c 8.0.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-63462",
  "lastModified": "2026-08-21T19:17:31.927",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-21T19:17:31.927",
  "references": [
    {
      "source": "security-advisories@github.com",
      "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"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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