---
id: CVE-2026-109292
title: >-
  Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure
  vulnerability that allows destination servers to obtain user session cookies
  by receiving the full browser cookie jar on OAuth-mode connections
summary: >-
  Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure
  vulnerability that allows destination servers to obtain user session cookies
  by receiving the full browser cookie jar on OAuth-mode connections. Operators
  of OpenAI-…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-200
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:22.500'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109292'
references:
  - url: >-
      https://github.com/open-webui/open-webui/commit/3cda47cdb449aac970426f0929c9e5f8bb8bd807
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/open-webui/open-webui/commit/b71744b17823f7a3a9a64cb363e79a7164ed5b23
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/open-webui/open-webui/commit/f9f815c86220f809fad5ee1300c44f55dea74c79
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-gqfh-jxvw-74rp
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/open-webui-0.6.27-before-0.11.4-session-token-disclosure-via-oauth-mode-connections
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.191Z'
---

## Overview

Open WebUI from 0.6.27 before 0.11.4 contains an information disclosure vulnerability that allows destination servers to obtain user session cookies by receiving the full browser cookie jar on OAuth-mode connections. Operators of OpenAI-compatible connections, OpenAPI tool servers or terminal servers can capture forwarded session cookies from routine requests and replay them to hijack accounts, including administrators.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.