---
id: CVE-2026-70489
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 0.11.0, automation recurrence parsing in
  backend/open_webui/utils/automations.py anchored minutely and hourly rules at
  a fixed date of…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-1333
vendor: openwebui
product: open_webui
affected:
  - 'open_webui >= 0.9.0, < 0.11.0'
patched:
  - open_webui 0.11.0
published: '2026-08-04'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T14:57:16.723'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70489'
references:
  - url: >-
      https://github.com/open-webui/open-webui/commit/c4ae8c86786fed521960466f6d8eef8af22c2946
    label: security-advisories@github.com
  - url: 'https://github.com/open-webui/open-webui/releases/tag/v0.11.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-73cq-mcgh-379c
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-73cq-mcgh-379c
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-73cq-mcgh-379c'
tags:
  - nvd
  - ghsa
  - pip
epss: 0.0037
epssPercentile: 0.3072
aliases:
  - GHSA-73cq-mcgh-379c
ecosystem: pip
ingestedAt: '2026-08-04T21:42:19.729Z'
---

## Overview

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, automation recurrence parsing in backend/open_webui/utils/automations.py anchored minutely and hourly rules at a fixed date of 2000-01-01 and then walked forward one interval at a time to find the next run. A single FREQ=MINUTELY rule enumerates roughly a quarter-century of occurrences synchronously on the event loop that also serves scheduler, HTTP, and WebSocket traffic, and the scheduler recomputes the next run for every claimed row on each poll. This causes availability impact for every other user of the instance. This issue is fixed in 0.11.0.

## Affected

- `open_webui >= 0.9.0, < 0.11.0`

## Remediation

Upgrade past the affected range:

- `open_webui 0.11.0`

## Package advisory (CVE-2026-70489)

Affected packages:

- `open-webui >= 0.9.0, < 0.11.0`

Patched in:

- `open-webui 0.11.0`

Source: https://github.com/advisories/GHSA-73cq-mcgh-379c