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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-87012
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-09 21:17:06 UTC
Updated2026-09-10 18:18:10 UTC
DescriptionOpen 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

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

EPSS: 0.002680000 probability, percentile 0.188310000 (date 2026-09-10)

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-webui Open-webui affected >= 0.9.0, < 0.11.1 Not specified

References

ReferenceSourceLinkTags
github.com/open-webui/open-webui/pull/28790 [email protected] github.com
github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g [email protected] github.com
github.com/open-webui/open-webui/releases/tag/v0.11.1 [email protected] github.com
github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139c... [email protected] github.com
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