CVE-2026-87012

MEDIUM 4.3

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

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-754 CWE-1287
Vendor	open-webui
Product	open-webui
Published	Sep 9, 2026
Last Updated	Sep 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

open-webui / open-webui

>= 0.9.0, < 0.11.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g github.com: https://github.com/open-webui/open-webui/pull/28790 github.com: https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784 github.com: https://github.com/open-webui/open-webui/releases/tag/v0.11.1