CVE-2026-87999— Open WebUI: Any authenticated user can reach the Azure platform channel via server-side web fetch
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。 在版本 0.11.1 之前， 中的 和 接口将 Python 中“全局可路由地址”的分类结果，直接视为目标地址属于外部网络。 已认证的用户可以利用这一点，使部署在 Azure 上的实例抓取并返回来自 （即 Azure 平台通道地址）以及其他标准分类未拒绝的保留网段中的内容，从而引发安全漏洞。 该问题已在 0.11.1 版本中修复。
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I. Basic Information for CVE-2026-87999
Vulnerability Information
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Vulnerability Title
Open WebUI: Any authenticated user can reach the Azure platform channel via server-side web fetch
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.1, POST /api/v1/retrieval/process/web and POST /api/v1/retrieval/process/web/search in backend/open_webui/retrieval/web/utils.py treated Python's globally routable address classification as proof that a destination was external. An authenticated user could make an Azure-hosted instance fetch and return content from 168.63.129.16, the Azure platform channel, as well as other reserved ranges that the standard classification did not reject. This issue is fixed in version 0.11.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| open-webui | open-webui | < 0.11.1 | - |
|
II. Public POCs for CVE-2026-87999
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-87999 (3)
Same Patch Batch · open-webui · 2026-09-09 · 16 CVEs total
| CVE-2026-87995 | 8.7 HIGH | Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcodin |
| CVE-2026-87016 | 8.1 HIGH | Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on |
| CVE-2026-87996 | 7.7 HIGH | Open WebUI: SSRF into internal services via DNS rebinding in the Playwright web loader |
| CVE-2026-87011 | 7.5 HIGH | Open WebUI: Unauthenticated requests can stall the server via uncached OIDC fetches in bac |
| CVE-2026-87998 | 7.1 HIGH | Open WebUI: Non-admin users can delete admin-owned external knowledge connections via know |
| CVE-2026-87015 | 6.8 MEDIUM | Open WebUI: A user's session cookies are sent to tool servers configured for bearer authen |
| CVE-2026-87014 | 6.5 MEDIUM | Open WebUI: Admin demoted through SSO role sync keeps read and write access to all users' |
| CVE-2026-88000 | 6.5 MEDIUM | Open WebUI: Any authenticated user can hang the server via message deletion in a cyclic ch |
| CVE-2026-88002 | 6.5 MEDIUM | Open WebUI: Any authenticated user can hang the server via a cyclic chat message history |
| CVE-2026-88001 | 5.0 MEDIUM | Open WebUI: Server-side fetches reach blocked and internal hosts via unvalidated HTTP redi |
| CVE-2026-87012 | 4.3 MEDIUM | Open WebUI: Any authenticated user can suppress calendar alerts instance-wide via a non-nu |
| CVE-2026-87013 | 4.3 MEDIUM | Open WebUI: Any authenticated user can start a non-terminating request via a folder parent |
| CVE-2026-87017 | 4.3 MEDIUM | Open WebUI: Inaccessible knowledge bases are exposed through the built-in knowledge tool o |
| CVE-2026-87994 | 4.3 MEDIUM | Open WebUI: Channel members can overwrite another member's message via the chat completion |
| CVE-2026-87997 | 4.3 MEDIUM | Open WebUI: Any authenticated user can inject chats into another user's folder via chat co |
IV. Related Vulnerabilities
Same product: open-webui
-
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-2026-87998
Open WebUI: Non-admin users can delete admin-owned external -
CVE-2026-87997
Open WebUI: Any authenticated user can inject chats into ano
Same vendor: open-webui
-
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-2026-87998
Open WebUI: Non-admin users can delete admin-owned external -
CVE-2026-87997
Open WebUI: Any authenticated user can inject chats into ano
Same weakness: CWE-918
-
CVE-2026-88001
Open WebUI: Server-side fetches reach blocked and internal h -
CVE-2026-19233
CWE-918：服务器请求伪造（SSRF）漏洞 -
CVE-2026-86771
Snipe-IT before 8.7.0 Server-Side Request Forgery via employ -
CVE-2026-87821
Lara Dashboard 0.9.2 through 1.3.1 Server-Side Request Forge -
CVE-2026-79635
Dell SCG 5.0 多版本SSRF漏洞
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