---
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: 0.51102
aliases:
  - GHSA-r5pq-6chh-j3xp
ecosystem: npm
ingestedAt: '2026-08-21T19:21:05.409Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-63462)

Affected packages:

- `unleash-server < 7.5.2`
- `unleash-server >= 7.6.0, < 7.6.5`
- `unleash-server >= 8.0.0, < 8.0.2`

Patched in:

- `unleash-server 7.5.2`
- `unleash-server 7.6.5`
- `unleash-server 8.0.2`

Source: https://github.com/advisories/GHSA-r5pq-6chh-j3xp