> CVE-2026-87012 [MEDIUM]

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PUBLISHED
2026-09-09 21:17
MODIFIED
2026-09-09 21:17
CVSS_SCORE V3
4.3
EPSS (Prob. Exploit)
0.48%
Top 59.2%
DATA SOURCES:
NVD đź”— 2026-09-09 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-09-16 OSV đź”— 2026-09-14

> DESCRIPTION

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.1, backend/open_webui/models/calendar.py stored the calendar event meta.alert_minutes value without type validation and the shared upcoming-event scheduler compared that value numerically. An authenticated user with the calendar permission could store a non-numeric alert_minutes value that raised an exception and aborted the instance-wide alert pass, suppressing all users' reminders while the event remained in the lookahead window. This issue is fixed in version 0.11.1.

> 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:N/A:L
EXPLOITABILITY
2.8
IMPACT
1.4

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
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
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
Low (L)
Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
Low
Interruption partielle du service possible

> WEAKNESSES

CWE-754 CWE-1287

> CWE DETAILED DESCRIPTIONS

CWE-754: Improper Check for Unusual or Exceptional Conditions - The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product. | CWE-1287: Improper Validation of Specified Type of Input - The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.

> GITHUB SECURITY ADVISORY

GHSA-v39v-59xw-j98g MODERATE

Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value

AFFECTED PACKAGES:
PIP / open-webui
>= 0.9.0, < 0.11.1
Fixed in: 0.11.1

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value

AFFECTED PACKAGES:
Unknown / Unknown
10 versions affected
ALIASES:
GHSA-v39v-59xw-j98g

> HISTORIQUE DES MODIFICATIONS

Première apparition
09/09/2026 21:17
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-754: Improper Check for Unusual or Exceptional Conditions - The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during ...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139c...
https://github.com/open-webui/open-webui/pull/28790
https://github.com/open-webui/open-webui/releases/tag/v0.11.1
https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g
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