{"id":"CVE-2026-63462","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-63462","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…","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.","published":"2026-08-21T19:17:31.927","modified":"2026-08-21T19:17:31.927","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf","label":"Unleash/unleash@b0e4da6"},"references":[{"type":"WEB","url":"https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf"},{"type":"WEB","url":"https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1"},{"type":"WEB","url":"https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d"},{"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":"WEB","url":"https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-21T19:17:31.927"}}