---
id: CVE-2026-70481
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 0.5.0 until 0.11.0, the standard channel message update and
  delete handlers accepted any caller holding write access on the channel
  without checki…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-284
  - CWE-862
vendor: openwebui
product: open_webui
affected:
  - 'open_webui >= 0.5.0, < 0.11.0'
patched:
  - open_webui 0.11.0
published: '2026-08-04'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T14:46:06.190'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70481'
references:
  - url: >-
      https://github.com/open-webui/open-webui/commit/c609ec41154fa092fa0af80d9d365de06b666286
    label: security-advisories@github.com
  - url: 'https://github.com/open-webui/open-webui/pull/27197'
    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-mj5r-jf49-m3w7
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-mj5r-jf49-m3w7'
tags:
  - nvd
  - exploit-available
  - ghsa
  - pip
epss: 0.00295
epssPercentile: 0.22357
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/Foxer131/CVE-2026-70481'
  checkedAt: '2026-09-24T07:53:14.118Z'
exploitAvailable: true
aliases:
  - GHSA-mj5r-jf49-m3w7
ecosystem: pip
ingestedAt: '2026-08-04T20:41:44.008Z'
---

## Overview

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.5.0 until 0.11.0, the standard channel message update and delete handlers accepted any caller holding write access on the channel without checking that the caller wrote the message. Because write access is the same grant a member needs to post, any ordinary participant in a shared standard channel could rewrite or permanently delete another participant message, while group and direct message handlers enforced authorship. This issue is fixed in 0.11.0.

## Affected

- `open_webui >= 0.5.0, < 0.11.0`

## Remediation

Upgrade past the affected range:

- `open_webui 0.11.0`

## Package advisory (CVE-2026-70481)

Affected packages:

- `open-webui >= 0.5.0, <= 0.10.2`

Patched in:

- `open-webui 0.11.0`

Source: https://github.com/advisories/GHSA-mj5r-jf49-m3w7