---
cve: "CVE-2026-63004"
severity: "MEDIUM"
cvss: 5.5
epss: "0.3%"
vendor: "Unleash"
kev: false
exploited: false
published: "2026-08-21 19:17:30"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-25T12:41:48+02:00"
---

# CVE-2026-63004

> 5.5 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- b4d1bf8917a8059ffb9eb32f11af6bc1473a7782 (Commit)
- b501005d1d9961605e9c7b5333d17c8ca14579f1 (Commit)

## Referenzen

- <https://github.com/Unleash/unleash/security/advisories/GHSA-5vf6-jrqr-78fj>
- <https://github.com/Unleash/unleash/commit/2100db76af3473f13e6fb40096cf17a9c2b741a1>
- <https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1c1>
- <https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf806d>
- <https://github.com/Unleash/unleash/releases/tag/v7.5.2>
- <https://github.com/Unleash/unleash/releases/tag/v7.6.5>
- <https://github.com/Unleash/unleash/releases/tag/v8.0.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63004) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_