{"cve":"CVE-2026-63462","nvd":{"published":"2026-08-21T19:17:31.927","modified":"2026-10-14T19:10:00.297","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-674"],"references":["https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf","https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1","https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d","https://github.com/Unleash/unleash/releases/tag/v7.5.2","https://github.com/Unleash/unleash/releases/tag/v7.6.5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-63462","score":0.00699,"percentile":0.52863,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-r5pq-6chh-j3xp","url":"https://osv.dev/vulnerability/GHSA-r5pq-6chh-j3xp","summary":"Unleash: Unauthenticated single-request DoS via OpenAPI validation error formatter","modified":"2026-08-21T19:40:58.188508Z","packages":[{"ecosystem":"npm","name":"unleash-server","purl":"pkg:npm/unleash-server","ranges":["<7.5.2"],"fixed":["7.5.2"]},{"ecosystem":"npm","name":"unleash-server","purl":"pkg:npm/unleash-server","ranges":[">=7.6.0 <7.6.5"],"fixed":["7.6.5"]},{"ecosystem":"npm","name":"unleash-server","purl":"pkg:npm/unleash-server","ranges":[">=8.0.0 <8.0.2"],"fixed":["8.0.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}