CVE-2026-54022— Open WebUI: Any authenticated user can read other users' private notes via Socket.IO
Possible ATT&CK Techniques 1AI
T1530 · Data from Cloud StorageAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| open-webui | open-webui | < 0.8.11 | affected |
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I. Basic Information for CVE-2026-54022
Vulnerability Information
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Vulnerability Title
Open WebUI: Any authenticated user can read other users' private notes via Socket.IO
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the ydoc:document:join Socket.IO handler checks note ownership only when the document_id starts with note: (colon). However, the YdocManager storage layer normalizes all document IDs by replacing colons with underscores (document_id.replace(":", "_")). An attacker can join a document room using note_<id> (underscore) instead of note:<id> (colon), bypassing the authorization check entirely while accessing the same underlying Yjs document. The server then returns the full document state, leaking the victim's private note contents. This vulnerability is fixed in 0.8.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不正确的解析名称或索引
Source: CVE Program / CVE List V5
Vulnerability Title
Open WebUI 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open WebUI是Open WebUI团队开源的一个可扩展、功能丰富、用户友好的自托管 WebUI。 Open WebUI 0.8.11之前版本存在安全漏洞，该漏洞源于ydoc:document:join Socket.IO处理程序仅当document_id以note:开头时检查笔记所有权，而YdocManager存储层通过将冒号替换为下划线规范所有文档ID，攻击者可使用note_<id>绕过授权检查并加入文档房间，导致服务器返回完整文档状态，泄露受害者私有笔记内容。
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 | < 0.8.11 | - |
II. Public POCs for CVE-2026-54022
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-54022 (1)
Same Patch Batch · open-webui · 2026-06-23 · 15 CVEs total
| CVE-2026-54011 | 8.7 HIGH | Open WebUI: Stored XSS in Mermaid Markdown Preview |
| CVE-2026-54008 | 8.5 HIGH | Open WebUI: Redirect-Bypass SSRF in OAuth `_process_picture_url` |
| CVE-2026-54010 | 8.3 HIGH | Open WebUI: Forged chat-file link allows cross-user file read and deletion |
| CVE-2026-54018 | 7.7 HIGH | Open WebUI: SSRF Protection Bypass in Playwright Web Loader via HTTP Redirects |
| CVE-2026-54013 | 7.6 HIGH | Open WebUI: Stored XSS to Account Takeover via Model Profile Images in Open WebUI |
| CVE-2026-54012 | 7.1 HIGH | Open WebUI: Forged model meta.knowledge allows cross-user file read and deletion |
| CVE-2026-54009 | 6.5 MEDIUM | Open WebUI: Cross-user file disclosure via /api/chat/completions image_url field |
| CVE-2026-54019 | 6.5 MEDIUM | Open WebUI: RAG ACL Bypass in Milvus Multitenancy Mode |
| CVE-2026-54015 | 6.4 MEDIUM | Open WebUI: Prompt history IDOR: unbound history_id allows cross-prompt read and deletion |
| CVE-2026-54021 | 6.3 MEDIUM | Open WebUI: Authenticated users can target arbitrary configured Ollama backends via unguar |
| CVE-2026-54016 | 4.3 MEDIUM | Open WebUI: Open WebUI BOLA: `search_knowledge_files` Allows Unauthorized Knowledge Base F |
| CVE-2026-54006 | 4.3 MEDIUM | Open WebUI: Calendar event re-parenting allows writing events into another user's calendar |
| CVE-2026-54014 | 4.3 MEDIUM | Open WebUI: Sibling-Prefix Path Traversal via /cache/{path} in open-webui/open-webui |
| CVE-2026-54007 | Open WebUI: Cross-origin postMessage confirmation bypass via action:submit |
IV. Related Vulnerabilities
Same product: open-webui
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Open WebUI: Any authenticated user can stall a worker via a - CVE-2026-70492
Open WebUI: Stored XSS via unescaped KaTeX render-error fall - CVE-2026-70491
Open WebUI: Tool source code disclosed to read-only users vi
Same vendor: open-webui
- CVE-2026-59714
Open WebUI: Cross-channel message overwrite via chat complet - CVE-2026-70494
Open WebUI: A folder write-collaborator can permanently dele - CVE-2026-70493
Open WebUI: Any authenticated user can stall a worker via a - CVE-2026-70492
Open WebUI: Stored XSS via unescaped KaTeX render-error fall - CVE-2026-70491
Open WebUI: Tool source code disclosed to read-only users vi
Same weakness: CWE-706
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cJSON 1.7.19 Wrong-Key Modification via JSON Pointer Escape - CVE-2026-16120
nextlevelbuilder GoClaw exec_approval.go extractBin name res - CVE-2026-62190
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Use of Incorrectly-Resolved Name or Reference in GitLab
V. Comments for CVE-2026-54022
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