> CVE-2026-45395 [HIGH]

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PUBLISHED
2026-05-15 21:16
MODIFIED
2026-05-15 21:16
CVSS_SCORE V3
7.2
EPSS (Prob. Exploit)
0.44%
Top 62.0%
DATA SOURCES:
NVD đź”— 2026-05-15 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 GITHUB đź”— 2026-10-29 OSV đź”— 2026-11-02

> DESCRIPTION

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, the tool update endpoint (POST /api/v1/tools/id/{id}/update) is missing the workspace.tools permission check that is present on the tool create endpoint. This allows a user who has been explicitly denied tool management capabilities ( and who the administrator considers untrusted for code execution ) to replace a tool's server-side Python content and trigger execution, bypassing the intended workspace.tools security boundary. This vulnerability is fixed in 0.9.5.

> 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:U/C:H/I:H/A:H
EXPLOITABILITY
1.2
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-269 CWE-862

> CWE DETAILED DESCRIPTIONS

CWE-269: Improper Privilege Management - The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. | 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-p4fx-23fq-jfg6 HIGH

Open WebUI: Missing `workspace.tools` Authorization Check on Tool Update Endpoint Allows Privilege Escalation to Code Execution

AFFECTED PACKAGES:
NPM / open-webui
< 0.9.5
Fixed in: 0.9.5

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Open WebUI: Missing `workspace.tools` Authorization Check on Tool Update Endpoint Allows Privilege Escalation to Code Execution

AFFECTED PACKAGES:
Unknown / Unknown
161 versions affected
ALIASES:
GHSA-p4fx-23fq-jfg6

> HISTORIQUE DES MODIFICATIONS

Première apparition
15/05/2026 21:16
Source: NVD
đź“Š ENRICHISSEMENT 01/06/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-269: Improper Privilege Management - The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. | CWE-862: Miss...
Total des modifications: 1 Dernière mise à jour: 5 months ago

> REFERENCES

https://github.com/open-webui/open-webui/security/advisories/GHSA-p4fx-23fq-jfg6
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