{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "7.5.2"
              },
              {
                "introduced": "7.6.0"
              },
              {
                "fixed": "7.6.5"
              },
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "e3e6336fafaddebc8c7afbc12bbf08566a80b853"
            },
            {
              "introduced": "7e69bb26a137a38bb420c3c3238888cb6c411227"
            },
            {
              "fixed": "b4d1bf8917a8059ffb9eb32f11af6bc1473a7782"
            },
            {
              "fixed": "b501005d1d9961605e9c7b5333d17c8ca14579f1"
            },
            {
              "fixed": "8ee9e914cec88ee18e7677f41a84db7c8eeda8fb"
            },
            {
              "fixed": "b0e4da63249a9403bc209e0581db223326cb8dcf"
            },
            {
              "fixed": "d45f99df924c0d24747b3e45e46fcda7dcd3c1c1"
            },
            {
              "fixed": "d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d"
            }
          ],
          "repo": "https://github.com/unleash/unleash",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-r5pq-6chh-j3xp"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63462.json"
  },
  "details": "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",
  "modified": "2026-08-23T03:42:33.610504394Z",
  "published": "2026-08-21T18:12:32.807Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Unleash/unleash/releases/tag/v7.5.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Unleash/unleash/releases/tag/v7.6.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Unleash/unleash/releases/tag/v8.0.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63462.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63462"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Unleash: Unauthenticated single-request DoS via OpenAPI validation error formatter"
}