> CVE-2026-77426 [HIGH]

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PUBLISHED
2026-09-22 21:17
MODIFIED
2026-09-22 21:17
CVSS_SCORE V3
7.1
EPSS (Prob. Exploit)
0.48%
Top 59.6%
DATA SOURCES:
NVD 🔗 2026-09-22 CWE MITRE 🔗 2026-10-01 FIRST EPSS 🔗 2026-10-21 GITHUB 🔗 2026-09-24 OSV 🔗 2026-10-19

> DESCRIPTION

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.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

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

> WEAKNESSES

CWE-639 CWE-862

> CWE DETAILED DESCRIPTIONS

CWE-639: Authorization Bypass Through User-Controlled Key - The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. | CWE-862: Missing Authorization - The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

> GITHUB SECURITY ADVISORY

GHSA-72h8-wp98-7hch HIGH

Unleash: Missing await on permission check + cross-project IDOR in admin API

AFFECTED PACKAGES:
NPM / unleash-server
< 8.0.3
Fixed in: 8.0.3

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Unleash: Missing await on permission check + cross-project IDOR in admin API

AFFECTED PACKAGES:
Unknown / Unknown
575 versions affected
ALIASES:
GHSA-72h8-wp98-7hch

> HISTORIQUE DES MODIFICATIONS

Première apparition
22/09/2026 21:17
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-639: Authorization Bypass Through User-Controlled Key - The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/Unleash/unleash/commit/7bb2829fc40791aa478e8ffca149c11b0f9cb0...
https://github.com/Unleash/unleash/commit/ace121c922d2e3eb6f68d95b0b6ab2fc8d824e...
https://github.com/Unleash/unleash/commit/bea7effd3687425630423f662136d548e10015...
https://github.com/Unleash/unleash/commit/c93a963e95e1b7bf1bca2a7729282a48d0eb2f...
https://github.com/Unleash/unleash/commit/dd61d0e10f5977a2e5de78df467c3a17c09fbc...
https://github.com/Unleash/unleash/releases/tag/v8.0.3
https://github.com/Unleash/unleash/security/advisories/GHSA-72h8-wp98-7hch
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