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CVE-2026-109292— Open WebUI 0.6.27 before 0.11.4 Session Token Disclosure via OAuth-Mode Connections

Quick assessment

Affected
open-webui open-webui
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open WebUI 从 0.6.27 到 0.11.4（不含 0.11.4 版本）存在一个信息泄露漏洞。在 OAuth 模式连接下，该漏洞允许目标服务器通过接收完整的浏览器 Cookie 来获取用户的会话 Cookie。开放兼容 OpenAI 的连接、OpenAPI 工具服务器或终端服务器的运营者可以捕获常规请求中转发会话 Cookie，并通过重放这些 Cookie 来劫持账户，包括管理员账户。

CVSS 6.8 · Medium EPSS 0.32% · P23

Affected Version Matrix 2

VendorProduct Version RangeStatus
open-webui open-webui 0.6.27< 0.11.4 affected
0.11.4 unaffected
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I. Basic Information for CVE-2026-109292

Vulnerability Information
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Vulnerability Title
Open WebUI 0.6.27 before 0.11.4 Session Token Disclosure via OAuth-Mode Connections
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-webui open-webui 0.6.27 ~ 0.11.4 -

II. Public POCs for CVE-2026-109292

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III. Intelligence Information for CVE-2026-109292

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Patches & Fixes for CVE-2026-109292 (3)

Vendor Advisories for CVE-2026-109292 (2)

Same Patch Batch · open-webui · 2026-10-12 · 19 CVEs total

CVE-2026-109286 8.1 HIGH Open WebUI 0.7.0 before 0.11.4 Session Token Theft via SyncStatsModal
CVE-2026-109572 7.6 HIGH Open WebUI 0.8.6 before 0.11.4 Privilege Escalation via Terminal Proxy
CVE-2026-109291 7.3 HIGH Open WebUI 0.6.33 before 0.11.4 Stored XSS via Citation embed_url
CVE-2026-109290 7.3 HIGH Open WebUI 0.11.1 before 0.11.4 Stored XSS via DOCX Preview
CVE-2026-109297 6.5 MEDIUM Open WebUI 0.11.0 before 0.11.4 Denial of Service via Automation Recurrence Rules
CVE-2026-109298 6.5 MEDIUM Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex
CVE-2026-109294 6.5 MEDIUM Open WebUI 0.6.42 before 0.11.4 Memory Exhaustion via Compressed Remote Image
CVE-2026-109293 6.5 MEDIUM Open WebUI 0.11.0 before 0.11.4 Tool Source Disclosure via Tool Export Endpoint
CVE-2026-109295 6.5 MEDIUM Open WebUI 0.11.0 before 0.11.4 ReDoS via grep_knowledge_files Event Loop
CVE-2026-109299 6.5 MEDIUM Open WebUI 0.9.0 before 0.11.4 Denial of Service via Recurrence Rule Validation
CVE-2026-109288 6.4 MEDIUM Open WebUI before 0.11.4 Stored XSS via javascript: URLs in Markdown Links
CVE-2026-109289 6.3 MEDIUM Open WebUI 0.8.8 before 0.11.4 Improper Session Revocation via Terminal WebSocket
CVE-2026-109283 5.4 MEDIUM Open WebUI 0.11.1 before 0.11.4 Authorization Bypass via OAuth Token Exchange
CVE-2026-109285 5.0 MEDIUM Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata
CVE-2026-109300 4.6 MEDIUM Open WebUI 0.6.31 before 0.11.4 Stored XSS via Tool-Call Embeds
CVE-2026-109287 4.3 MEDIUM Open WebUI 0.9.6 before 0.11.4 Information Disclosure via Unscoped Directory ID
CVE-2026-109296 4.3 MEDIUM Open WebUI before 0.11.4 Missing Authorization via Backend Index on Model Routes
CVE-2026-109284 4.3 MEDIUM Open WebUI 0.11.0 before 0.11.4 Improper Authorization via Chat Fork Endpoint

IV. Related Vulnerabilities

Same product: open-webui
Same vendor: open-webui
Same weakness: CWE-200

V. Comments for CVE-2026-109292

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