> CVE-2026-44562 [MEDIUM]

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PUBLISHED
2026-05-15 20:16
MODIFIED
2026-05-15 20:16
CVSS_SCORE V3
6.5
EPSS (Prob. Exploit)
0.35%
Top 72.2%
DATA SOURCES:
NVD đź”— 2026-05-15 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-11-05 OSV đź”— 2026-11-02

> DESCRIPTION

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the POST /api/v1/models/import endpoint allows users with the workspace.models_import permission to overwrite any existing model in the database, regardless of ownership. When an imported model's ID matches an existing model, the endpoint merges the attacker's payload over the existing model data and writes it to the database with no ownership or access grant validation. Additionally, filter_allowed_access_grants is never called, bypassing the access grant restrictions enforced on all other model mutation endpoints. This vulnerability is fixed in 0.9.0.

> 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:L/UI:N/S:U/C:N/I:H/A:N
EXPLOITABILITY
2.8
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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
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
None (N)
Aucune divulgation 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
None
Aucune divulgation d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-283 CWE-862

> CWE DETAILED DESCRIPTIONS

CWE-283: Unverified Ownership - The product does not properly verify that a critical resource is owned by the proper entity. | 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-mqq6-cqcx-38vg MODERATE

Open WebUI's Model Import Overwrites Any Model Without Ownership Check

AFFECTED PACKAGES:
PIP / open-webui
<= 0.8.12
Fixed in: 0.9.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Open WebUI: Model Import Overwrites Any Model Without Ownership Check

AFFECTED PACKAGES:
Unknown / Unknown
156 versions affected
ALIASES:
GHSA-mqq6-cqcx-38vg, PYSEC-2026-2749

> HISTORIQUE DES MODIFICATIONS

Première apparition
15/05/2026 20:16
Source: NVD
📊 ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-283: Unverified Ownership - The product does not properly verify that a critical resource is owned by the proper entity. | CWE-862: Missing Authorization - The product does not perform an authoriz...
Total des modifications: 1 Dernière mise à jour: 5 months ago

> REFERENCES

https://github.com/open-webui/open-webui/security/advisories/GHSA-mqq6-cqcx-38vg
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