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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-v39v-59xw-j98g Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 10 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 10 Sep 2026 11:15:00 +0000

Type Values Removed Values Added
First Time appeared Open-webui
Open-webui open-webui
Vendors & Products Open-webui
Open-webui open-webui

Wed, 09 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
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.
Title Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value
Weaknesses CWE-1287
CWE-754
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-10T17:48:20.357Z

Reserved: 2026-09-08T16:44:23.783Z

Link: CVE-2026-87012

cve-icon Vulnrichment

Updated: 2026-09-10T17:28:56.987Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-09T21:17:06.030

Modified: 2026-09-10T18:18:10.610

Link: CVE-2026-87012

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-10T11:00:09Z

Weaknesses