---
id: CVE-2026-88005
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 0.8.0 until 0.9.0, Open WebUI's OAuth token exchange endpoint
  issues a session for a provider access token without applying the email domain
  allow…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-863
vendor: openwebui
product: open_webui
affected:
  - 'open_webui >= 0.8.0, < 0.9.0'
patched:
  - open_webui 0.9.0
published: '2026-09-10'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T14:44:04.137'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88005'
references:
  - url: >-
      https://github.com/open-webui/open-webui/commit/fb5ef978bfb451c3f2221931e08e54250cec58ca
    label: security-advisories@github.com
  - url: 'https://github.com/open-webui/open-webui/pull/23639'
    label: security-advisories@github.com
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-4qg5-cxx4-g927
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00217
epssPercentile: 0.12373
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-15T14:35:22.183673Z'
ingestedAt: '2026-09-12T15:55:07.018Z'
---

## Overview

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.9.0, Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without applying the email domain allowlist that the normal OAuth login callback enforces. An account whose email domain the login callback would refuse could still obtain a working session through this endpoint. This issue is fixed in version 0.9.0.

## Affected

- `open_webui >= 0.8.0, < 0.9.0`

## Remediation

Upgrade past the affected range:

- `open_webui 0.9.0`