Non-numeric Value Storage in Open WebUI Affects Alert Functionality
CVE-2026-87012

4.3MEDIUM

Key Information:

Vendor

Open-webui

Status
Open-webui
Vendor
CVE Published:
9 September 2026

What is CVE-2026-87012?

The Open WebUI platform has a vulnerability affecting versions 0.9.0 to 0.11.0, where the calendar event meta.alert_minutes value is stored without proper type validation. An authenticated user with calendar permissions could exploit this flaw by saving a non-numeric value for alert_minutes. This action leads to exceptions that abort the instance-wide alert pass, rendering all user reminders ineffective while the event remains within the lookahead window. The issue has been rectified in version 0.11.1, emphasizing the importance of updating to maintain alert functionality.

Affected Version(s)

open-webui >= 0.9.0, < 0.11.1

References

https://github.com/open-webui/open-webui/security/advisor...
x_refsource_CONFIRM
https://github.com/open-webui/open-webui/pull/28790
x_refsource_MISC
https://github.com/open-webui/open-webui/commit/abc69000b...
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.