---
id: CVE-2026-77426
title: Unleash is an open-source feature management platform
summary: >-
  Unleash is an open-source feature management platform. Prior to 8.0.3, the
  Unleash admin API contains five authorization vulnerabilities. POST
  /api/admin/segments/strategies assigns the Promise returned by hasPermission
  without awaiting …
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-639
  - CWE-862
vendor: Unleash
product: unleash
affected:
  - unleash < 8.0.3
patched:
  - unleash-server 8.0.3
published: '2026-09-22'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:12:04.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77426'
references:
  - url: >-
      https://github.com/Unleash/unleash/commit/7bb2829fc40791aa478e8ffca149c11b0f9cb05a
    label: security-advisories@github.com
  - url: >-
      https://github.com/Unleash/unleash/commit/ace121c922d2e3eb6f68d95b0b6ab2fc8d824ea1
    label: security-advisories@github.com
  - url: >-
      https://github.com/Unleash/unleash/commit/bea7effd3687425630423f662136d548e100154d
    label: security-advisories@github.com
  - url: >-
      https://github.com/Unleash/unleash/commit/c93a963e95e1b7bf1bca2a7729282a48d0eb2f6a
    label: security-advisories@github.com
  - url: >-
      https://github.com/Unleash/unleash/commit/dd61d0e10f5977a2e5de78df467c3a17c09fbcef
    label: security-advisories@github.com
  - url: 'https://github.com/Unleash/unleash/releases/tag/v8.0.3'
    label: security-advisories@github.com
  - url: 'https://github.com/Unleash/unleash/security/advisories/GHSA-72h8-wp98-7hch'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-72h8-wp98-7hch'
tags:
  - nvd
  - cve.org
  - ghsa
  - npm
epss: 0.00484
epssPercentile: 0.39002
aliases:
  - GHSA-72h8-wp98-7hch
ecosystem: npm
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-23T15:06:51.257660Z'
cvssSource: cna
ingestedAt: '2026-09-22T21:11:40.318Z'
---

## Overview

Unleash is an open-source feature management platform. Prior to 8.0.3, the Unleash admin API contains five authorization vulnerabilities. POST /api/admin/segments/strategies assigns the Promise returned by hasPermission without awaiting it, allowing authenticated users to modify segment assignments without UPDATE_FEATURE_STRATEGY permission for the target project and environment. GET /api/admin/projects/:projectId/features/:featureName/environments/:environment/variants does not bind the requested feature to projectId, allowing cross-project variant configuration disclosure. GET .../strategies/:strategyId uses strategyId without validating the project and feature context, allowing cross-project strategy configuration disclosure. getEnvironmentInfo does not validate that the requested feature belongs to the supplied project, allowing cross-project environment information disclosure. PUT /:projectId/tags accepts feature identifiers without verifying that they belong to the URL project, allowing cross-project tag modification. This issue is fixed in version 8.0.3.

## Remediation

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

## Package advisory (CVE-2026-77426)

Affected packages:

- `unleash-server < 8.0.3`

Patched in:

- `unleash-server 8.0.3`

Source: https://github.com/advisories/GHSA-72h8-wp98-7hch