CVE-2026-87012

medium

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform.

Vendor / product: Openwebui — open webui

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.

CVSS

4.3

4.3 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (security-advisories@github.com)

Timeline (UTC)

Published: 2026-09-09 21:17

Modified: 2026-09-15 16:17

NVD status: Analyzed

Last synced 1 day ago

Verified against the source API 2026-10-27 06:52 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

openwebui / open_webui ≥0.9.0 <0.11.1

Weakness classification (CWE)

CWE-754 CWE-1287

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g

Patch / mitigation: https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784

Patch / mitigation: https://github.com/open-webui/open-webui/pull/28790

References

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

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:52 UTC · record ↗

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CVE-2026-87012

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Weakness classification (CWE)

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References

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