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CVE-2026-44568— Open WebUI: Stored XSS in Pending User Overlay via Incorrect DOMPurify Application Order

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Open WebUI开源的一个可扩展、功能丰富、用户友好的自托管 WebUI。 Open WebUI 0.9.0之前版本存在跨站脚本漏洞，该漏洞源于AccountPending.svelte组件使用marked.parse()在{@html}内渲染管理员配置的待处理用户覆盖内容，且DOMPurify应用顺序错误，管理员可将任意JavaScript注入待处理用户覆盖内容，该脚本在查看覆盖页面的任何待处理用户的浏览器环境中执行。

CVSS 4.8 · Medium EPSS 0.17% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-webui open-webui < 0.9.0 affected
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I. Basic Information for CVE-2026-44568

Vulnerability Information
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Vulnerability Title
Open WebUI: Stored XSS in Pending User Overlay via Incorrect DOMPurify Application Order
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the AccountPending.svelte component renders the admin-configured "Pending User Overlay Content" using marked.parse() inside {@html} with an incorrect DOMPurify application order. An admin can inject arbitrary JavaScript into the Pending User Overlay Content that executes in the browser context of any pending user who views the overlay page. This vulnerability is fixed in 0.9.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Open WebUI 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open WebUI是Open WebUI开源的一个可扩展、功能丰富、用户友好的自托管 WebUI。 Open WebUI 0.9.0之前版本存在跨站脚本漏洞，该漏洞源于AccountPending.svelte组件使用marked.parse()在{@html}内渲染管理员配置的待处理用户覆盖内容，且DOMPurify应用顺序错误，管理员可将任意JavaScript注入待处理用户覆盖内容，该脚本在查看覆盖页面的任何待处理用户的浏览器环境中执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-webui open-webui < 0.9.0 -

II. Public POCs for CVE-2026-44568

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III. Intelligence Information for CVE-2026-44568

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Vendor Advisories for CVE-2026-44568 (1)

Same Patch Batch · open-webui · 2026-05-15 · 59 CVEs total

CVE-2026-44551 9.1 CRITICAL Open WebUI: LDAP Empty Password Authentication Bypass
CVE-2026-45672 8.8 HIGH Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature g
CVE-2026-45315 8.7 HIGH Open WebUI: Stored XSS via attacker-controlled file extension in /api/v1/audio/transcripti
CVE-2026-44552 8.7 HIGH Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Ena
CVE-2026-45331 8.5 HIGH Open WebUI: Full SSRF Vulnerability in the RAG Web Search Feature
CVE-2026-45400 8.5 HIGH Open WebUI: Server-Side Request Forgery (SSRF) bypass in `validate_url`
CVE-2026-45401 8.5 HIGH Open WebUI: SSRF Bypass via HTTP Redirect Following in Web-Fetch and Image-Load Endpoints
CVE-2026-44570 8.3 HIGH Open WebUI: Inconsistent authorization controls within memories API
CVE-2026-44565 8.1 HIGH Open WebUI: Open WebUI Arbitrary File Write, Delete via Path Traversal
CVE-2026-45675 8.1 HIGH Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts
CVE-2026-44553 8.1 HIGH Open WebUI: Stale Admin Role in Socket.IO Session Pool Enables Post-Demotion Cross-User No
CVE-2026-44554 8.1 HIGH Open WebUI: Knowledge Base Destruction and RAG Poisoning via Unauthorized Collection Overw
CVE-2026-45301 8.1 HIGH Open WebUI: Missing permission check in files API allows authenticated users to list, acce
CVE-2026-45665 8.1 HIGH Open WebUI: Stored XSS in Banner Component via Improper Sanitization Order
CVE-2026-45402 8.1 HIGH Open WebUI: Cross-User File Access via Unchecked file_id in Folder Knowledge and Knowledge
CVE-2026-45671 8.0 HIGH Open WebUI: shared-chat branch ignores access_type, allowing unauthorized file deletion
CVE-2026-45338 7.7 HIGH Open WebUI: SSRF via OAuth Profile Picture URL in _process_picture_url (oauth.py)
CVE-2026-45303 7.7 HIGH Open WebUI: Stored XSS via the HTML renedering view
CVE-2026-44555 7.6 HIGH Open WebUI: Base Model Routing Bypasses Access Control via Model Chaining
CVE-2026-45398 7.5 HIGH Open WebUI: IDOR - Retrieval API Bypasses Knowledge Base Access Controls

Showing top 20 of 59 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: open-webui
Same vendor: open-webui
Same weakness: CWE-79

V. Comments for CVE-2026-44568

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