medium4.3
CVE-2026-87012
Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-numeric alert value
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | open-webui | >= 0.9.0, < 0.11.1 | 0.11.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openwebui | Open Webui | from 0.9.0 before 0.11.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-v39v-59xw-j98g
- https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g
- https://nvd.nist.gov/vuln/detail/CVE-2026-87012
- https://github.com/open-webui/open-webui/pull/28790
- https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784
- https://github.com/open-webui/open-webui/releases/tag/v0.11.1