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.
References8
- github.com/Unleash/unleash/commit/b0e4da63249a9403bc209e0581db2…
- github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fc…
- github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf…
- github.com/Unleash/unleash/releases/tag/v7.5.2
- github.com/Unleash/unleash/releases/tag/v7.6.5
- github.com/Unleash/unleash/releases/tag/v8.0.2
- github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j…
- github.com/Unleash/unleash/security/advisories/GHSA-r5pq-6chh-j…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 53 · as of 10 November 2026
- CWE
- CWE-674
Could this be exploited in your environment?
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