---
id: CVE-2026-70488
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 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write
  access to the knowledge base in the URL but then acted on directory and file
  ids su…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-639
  - CWE-863
vendor: openwebui
product: open_webui
affected:
  - 'open_webui >= 0.9.6, < 0.11.0'
patched:
  - open_webui 0.11.0
published: '2026-08-04'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T14:57:29.663'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70488'
references:
  - url: >-
      https://github.com/open-webui/open-webui/commit/707efeaed7992dd9896d5928559458f228b9a539
    label: security-advisories@github.com
  - url: 'https://github.com/open-webui/open-webui/pull/26722'
    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-jxc9-xmc4-gr23
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-jxc9-xmc4-gr23'
tags:
  - nvd
  - ghsa
  - pip
epss: 0.00213
epssPercentile: 0.11946
aliases:
  - GHSA-jxc9-xmc4-gr23
ecosystem: pip
ingestedAt: '2026-08-04T20:41:43.795Z'
---

## Overview

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, the sync cleanup endpoint authorized write access to the knowledge base in the URL but then acted on directory and file ids supplied in the request body without checking that those objects belonged to that knowledge base. A user with write access to one knowledge base could delete directories and remove file embeddings from another knowledge base, causing documents to drop out of retrieval results and breaking chat-with-file for targeted documents without disclosing contents. This issue is fixed in 0.11.0.

## Affected

- `open_webui >= 0.9.6, < 0.11.0`

## Remediation

Upgrade past the affected range:

- `open_webui 0.11.0`

## Package advisory (CVE-2026-70488)

Affected packages:

- `open-webui >= 0.9.6, <= 0.10.2`

Patched in:

- `open-webui 0.11.0`

Source: https://github.com/advisories/GHSA-jxc9-xmc4-gr23