> CVE-2026-63004 [MEDIUM]

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PUBLISHED
2026-08-21 19:17
MODIFIED
2026-08-21 19:17
CVSS_SCORE V3
5.5
EPSS (Prob. Exploit)
0.39%
Top 69.0%
DATA SOURCES:
NVD đź”— 2026-08-21 CWE MITRE đź”— 2026-09-01 FIRST EPSS đź”— 2026-10-18 GITHUB đź”— 2026-10-29 OSV đź”— 2026-10-26

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
EXPLOITABILITY
2.3
IMPACT
2.7

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
High (H)
Authentifié avec privilèges administratifs
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-918

> CWE DETAILED DESCRIPTIONS

CWE-918: Server-Side Request Forgery (SSRF) - The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

> GITHUB SECURITY ADVISORY

GHSA-5vf6-jrqr-78fj MODERATE

Unleash: Addon webhook URL is dialed server-side with no internal-address filtering, enabling SSRF to internal services / cloud metadata and exfiltration of configured request headers

AFFECTED PACKAGES:
NPM / unleash-server
>= 8.0.0, < 8.0.2
Fixed in: 8.0.2
NPM / unleash-server
>= 7.6.0, < 7.6.5
Fixed in: 7.6.5
NPM / unleash-server
< 7.5.2
Fixed in: 7.5.2

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Unleash: Addon webhook URL is dialed server-side with no internal-address filtering, enabling SSRF to internal services / cloud metadata and exfiltration of configured request headers

AFFECTED PACKAGES:
Unknown / Unknown
572 versions affected
ALIASES:
GHSA-5vf6-jrqr-78fj

> HISTORIQUE DES MODIFICATIONS

Première apparition
21/08/2026 19:17
Source: NVD
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-918: Server-Side Request Forgery (SSRF) - The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure th...
Total des modifications: 1 Dernière mise à jour: 1 month ago

> REFERENCES

https://github.com/Unleash/unleash/commit/2100db76af3473f13e6fb40096cf17a9c2b741...
https://github.com/Unleash/unleash/commit/d45f99df924c0d24747b3e45e46fcda7dcd3c1...
https://github.com/Unleash/unleash/commit/d862562a5ab8f2d1e40f6519c64cf0b4fdaf80...
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
https://github.com/Unleash/unleash/security/advisories/GHSA-5vf6-jrqr-78fj
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