CVE-2026-88005— Open WebUI: Users denied by the OAuth domain allowlist or role policy can still sign in via token exchange
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 是一个可扩展、功能丰富且用户友好的自托管 AI 平台。在 0.8.0 至 0.9.0 版本中，Open WebUI 的 OAuth token 交换端点会为提供者的访问令牌颁发会话，但未应用常规 OAuth 登录回调所强制执行的电子邮件域名白名单。因此，即使某账户的邮件域名会被常规登录回调拒绝，仍可能通过该端点获取有效会话。此问题已在 0.9.0 版本中修复。
Possible ATT&CK Techniques 1 AI
T1557.003 · DHCP Spoofing
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-88005
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Open WebUI: Users denied by the OAuth domain allowlist or role policy can still sign in via token exchange
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| open-webui | open-webui | >= 0.8.0, < 0.9.0 | - |
|
II. Public POCs for CVE-2026-88005
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-88005
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-88005 (2)
Vendor Advisories for CVE-2026-88005 (1)
IV. Related Vulnerabilities
Same product: open-webui
-
CVE-2026-88006
Open WebUI: Users denied by the OAuth role policy can still -
CVE-2026-88002
Open WebUI: Any authenticated user can hang the server via a -
CVE-2026-88001
Open WebUI: Server-side fetches reach blocked and internal h -
CVE-2026-88000
Open WebUI: Any authenticated user can hang the server via m -
CVE-2026-87999
Open WebUI: Any authenticated user can reach the Azure platf
Same vendor: open-webui
-
CVE-2026-88006
Open WebUI: Users denied by the OAuth role policy can still -
CVE-2026-88002
Open WebUI: Any authenticated user can hang the server via a -
CVE-2026-88001
Open WebUI: Server-side fetches reach blocked and internal h -
CVE-2026-88000
Open WebUI: Any authenticated user can hang the server via m -
CVE-2026-87999
Open WebUI: Any authenticated user can reach the Azure platf
Same weakness: CWE-863
-
CVE-2026-88044
rclone: RC per-server auth-proxy bypass -
CVE-2026-88939
knowns through 0.33.0 Authorization Bypass via project.set B -
CVE-2026-88006
Open WebUI: Users denied by the OAuth role policy can still -
CVE-2026-88894
Snipe-IT before 8.7.2 Authorization Bypass via Predefined Ki -
CVE-2026-88884
Renovate before 44.3.1 Authentication Bypass via Digest Upda
V. Comments for CVE-2026-88005
No comments yet