{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-63462",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-16T21:37:45.768Z",
        "datePublished": "2026-08-21T18:12:32.807Z",
        "dateUpdated": "2026-08-21T18:12:32.807Z"
    },
    "containers": {
        "cna": {
            "title": "Unleash: Unauthenticated single-request DoS via OpenAPI validation error formatter",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-674",
                            "lang": "en",
                            "description": "CWE-674: Uncontrolled Recursion",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "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"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp"
                },
                {
                    "name": "https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf"
                },
                {
                    "name": "https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1"
                },
                {
                    "name": "https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d"
                },
                {
                    "name": "https://github.com/Unleash/unleash/releases/tag/v7.5.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Unleash/unleash/releases/tag/v7.5.2"
                },
                {
                    "name": "https://github.com/Unleash/unleash/releases/tag/v7.6.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Unleash/unleash/releases/tag/v7.6.5"
                },
                {
                    "name": "https://github.com/Unleash/unleash/releases/tag/v8.0.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/Unleash/unleash/releases/tag/v8.0.2"
                }
            ],
            "affected": [
                {
                    "vendor": "Unleash",
                    "product": "unleash",
                    "versions": [
                        {
                            "version": "< 7.5.2",
                            "status": "affected"
                        },
                        {
                            "version": ">= 7.6.0, < 7.6.5",
                            "status": "affected"
                        },
                        {
                            "version": ">= 8.0.0, < 8.0.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-21T18:12:32.807Z"
            },
            "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."
                }
            ],
            "source": {
                "advisory": "GHSA-r5pq-6chh-j3xp",
                "discovery": "UNKNOWN"
            }
        }
    }
}