---
id: CVE-2026-63004
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 addon and integration subsystem passes the operator-controlled
  parameters.url value from src/lib/addons/webhook.ts and the Slack, Microsoft
  Team…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-918
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-2026-63004'
references:
  - url: >-
      https://github.com/Unleash/unleash/commit/2100db76af3473f13e6fb40096cf17a9c2b741a1
    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-5vf6-jrqr-78fj'
    label: security-advisories@github.com
  - url: 'https://github.com/Unleash/unleash/security/advisories/GHSA-5vf6-jrqr-78fj'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-5vf6-jrqr-78fj'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00338
epssPercentile: 0.2732
aliases:
  - GHSA-5vf6-jrqr-78fj
ecosystem: npm
ingestedAt: '2026-08-21T19:21:05.369Z'
---

## Overview

Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the addon and integration subsystem passes the operator-controlled parameters.url value from src/lib/addons/webhook.ts and the Slack, Microsoft Teams, Datadog, and New Relic integrations to Addon.fetchRetry in src/lib/addons/addon.ts without restricting loopback, link-local, private, or cloud metadata addresses. An authenticated actor with the root CREATE_ADDON or UPDATE_ADDON permission can cause the server to send requests from inside its network boundary, use integration event status as a blind probing oracle, forward Authorization, customHeaders, or DD-API-KEY values to an attacker-observed host, and deliver the feature-event JSON body to internal services. 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-2026-63004)

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-5vf6-jrqr-78fj