CVE-2026-87012

Summary

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 Software

VendorProductVersion RangeStatus
open-webuiopen-webui>= 0.9.0, < 0.11.1affected

Weaknesses

  • CWE-754: CWE-754: Improper Check for Unusual or Exceptional Conditions
  • CWE-1287: CWE-1287: Improper Validation of Specified Type of Input

References