CVE-2026-63462

{"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"}