{"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"}}}}

{}

{"affected": [{"affectedData": [{"product": "unleash", "vendor": "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"}]}], "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"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.5.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.6.0,7.6.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.0.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "unleash", "source": "cna", "vendor": "Unleash"}, "product": "unleash", "vendor": "unleash"}], "created": "2026-08-21T20:00:13.885900+00:00", "updated": "2026-08-21T21:15:04.930817+00:00", "vendors": ["unleash", "unleash$PRODUCT$unleash"]}