CVE Catalog

CVE-2026-87012

MediumCVSS 4.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.27%

19th percentile - higher than 19% of all known CVEs

Summary

Open WebUI from 0.9.0 to 0.11.1 stores the calendar event alert_minutes value without type validation, and the scheduler compares it numerically. An authenticated user with calendar permission can store a non-numeric value that raises an exception and aborts the instance-wide alert pass, suppressing all users' reminders.

Risk Assessment

An attacker can disable reminders for all users, potentially causing missed important events and disrupting organizational operations. The issue persists while the event remains in the lookahead window.

Recommendation

Upgrade Open WebUI to version 0.11.1 or later. Additionally, review existing calendar events for invalid alert_minutes values.

Other vulnerabilities in Open WebUI

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS