| Component | Open WebUI |
| Severity | medium (CVSS 4.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| Published (NVD) | 2026-09-09 |
| Last modified | 2026-09-15 |
| Affected versions | open_webui >= 0.9.0, < 0.11.1 |
| Fixed in | 0.11.1 |
| Weakness | CWE-754CWE-1287 |
| CISA KEV | not listed |
NVD description
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.
What to do
- Upgrade Open WebUI to
0.11.1or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-87012
- https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g
- https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784
- https://github.com/open-webui/open-webui/pull/28790
- https://github.com/open-webui/open-webui/releases/tag/v0.11.1
Read more
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