CVE-2026-88001— Open WebUI: Server-side fetches reach blocked and internal hosts via unvalidated HTTP redirect targets
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 0.9.5 至 0.11.1 版本中，当启用 时，服务器端 Web 抓取未对 HTTP 重定向的目标地址重新应用 或私有地址控制。因此，经过身份验证的用户可以将 aiohttp 和 requests 抓取路径重定向到被排除的主机、回环地址、私有网络或云元数据服务，从而将返回的内容路由至 Web 搜索、URL 摄取、页面抓取工具或聊天图像处理等模块。该问题已在 0.11.1 版本中修复。
Possible ATT&CK Techniques 3 AI
T1190 · Exploit Public-Facing Application T1005 · Data from Local System T1001.001 · Junk Data
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I. Basic Information for CVE-2026-88001
Vulnerability Information
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Vulnerability Title
Open WebUI: Server-side fetches reach blocked and internal hosts via unvalidated HTTP redirect targets
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 until 0.11.1, server-side web fetches did not reapply WEB_FETCH_FILTER_LIST or private-address controls to HTTP redirect destinations when AIOHTTP_CLIENT_ALLOW_REDIRECTS was enabled. An authenticated user could redirect the aiohttp and requests fetch paths to excluded hosts, loopback, private networks, or cloud metadata services and route resulting content into web search, URL ingestion, page-fetch tools, or chat image processing. This issue is fixed in version 0.11.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/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 | >= 0.9.5, < 0.11.1 | - |
|
II. Public POCs for CVE-2026-88001
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-88001 (3)
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https://github.com/open-webui/open-webui/security/advisories/GHSA-5x7x-4c3c-qf5w x_refsource_CONFIRM
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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-2026-87999 | 7.1 HIGH | Open WebUI: Any authenticated user can reach the Azure platform channel via server-side we |
| 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-2026-87012 | 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-2026-88000
Open WebUI: Any authenticated user can hang the server via m -
CVE-2026-87999
Open WebUI: Any authenticated user can reach the Azure platf -
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-2026-88000
Open WebUI: Any authenticated user can hang the server via m -
CVE-2026-87999
Open WebUI: Any authenticated user can reach the Azure platf -
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-2026-87999
Open WebUI: Any authenticated user can reach the Azure platf -
CVE-2026-19233
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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
V. Comments for CVE-2026-88001
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