{"id":"CVE-2026-63462","title":"Unleash is an open-source feature management platform","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 value from lodash.get to JSON.stringify in genericE…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-674"],"vendor":"unleash-server","product":"unleash-server","affected":["unleash-server < 7.5.2","unleash-server >= 7.6.0, < 7.6.5","unleash-server >= 8.0.0, < 8.0.2"],"patched":["unleash-server 7.5.2","unleash-server 7.6.5","unleash-server 8.0.2"],"published":"2026-08-21","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:20:38.860","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63462","references":[{"url":"https://github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db223326cb8dcf","label":"security-advisories@github.com"},{"url":"https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1","label":"security-advisories@github.com"},{"url":"https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d","label":"security-advisories@github.com"},{"url":"https://github.com/Unleash/unleash/releases/tag/v7.5.2","label":"security-advisories@github.com"},{"url":"https://github.com/Unleash/unleash/releases/tag/v7.6.5","label":"security-advisories@github.com"},{"url":"https://github.com/Unleash/unleash/releases/tag/v8.0.2","label":"security-advisories@github.com"},{"url":"https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp","label":"security-advisories@github.com"},{"url":"https://github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j3xp","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-r5pq-6chh-j3xp"}],"tags":["nvd","ghsa","npm"],"epss":0.00699,"epssPercentile":0.5103,"aliases":["GHSA-r5pq-6chh-j3xp"],"ecosystem":"npm","ingestedAt":"2026-08-21T19:21:05.409Z","slug":"CVE-2026-63462","body":"## Overview\n\nUnleash 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-63462)\n\nAffected packages:\n\n- `unleash-server < 7.5.2`\n- `unleash-server >= 7.6.0, < 7.6.5`\n- `unleash-server >= 8.0.0, < 8.0.2`\n\nPatched in:\n\n- `unleash-server 7.5.2`\n- `unleash-server 7.6.5`\n- `unleash-server 8.0.2`\n\nSource: https://github.com/advisories/GHSA-r5pq-6chh-j3xp","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}