CVE-2026-87012

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784	Patch
https://github.com/open-webui/open-webui/pull/28790	Issue Tracking Patch
https://github.com/open-webui/open-webui/releases/tag/v0.11.1	Release Notes
https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-09-09 21:17

Updated : 2026-09-15 16:17

NVD link : CVE-2026-87012

Mitre link : CVE-2026-87012

CVE.ORG link : CVE-2026-87012

JSON object : View

Products Affected

openwebui

open_webui

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

CWE-1287

Improper Validation of Specified Type of Input

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