---
id: CVE-2026-87012
title: >-
  Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI
  platform
summary: >-
  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 share…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-754
  - CWE-1287
vendor: openwebui
product: open_webui
affected:
  - 'open_webui >= 0.9.0, < 0.11.1'
patched:
  - open_webui 0.11.1
published: '2026-09-09'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T16:17:55.943'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87012'
references:
  - url: >-
      https://github.com/open-webui/open-webui/commit/abc69000b33b4894fbd97fc2c962139cf9a8d784
    label: security-advisories@github.com
  - url: 'https://github.com/open-webui/open-webui/pull/28790'
    label: security-advisories@github.com
  - url: 'https://github.com/open-webui/open-webui/releases/tag/v0.11.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-v39v-59xw-j98g
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87012'
  - url: 'https://github.com/open-webui/open-webui'
tags:
  - nvd
  - osv
  - pip
  - cve.org
epss: 0.00279
epssPercentile: 0.20558
aliases:
  - GHSA-v39v-59xw-j98g
ecosystem: pip
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T17:28:56.331947Z'
ingestedAt: '2026-09-11T14:42:19.865Z'
---

## Overview

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

- `open_webui >= 0.9.0, < 0.11.1`

## Remediation

Upgrade past the affected range:

- `open_webui 0.11.1`

## Package advisory (CVE-2026-87012)

Affected packages:

- `open-webui >= 0.9.0, < 0.11.1`

Patched in:

- `open-webui 0.11.1`

Source: https://osv.dev/vulnerability/GHSA-v39v-59xw-j98g