CVE-2026-29070— Open WebUI has unauthorized deletion of knowledge files
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I. Basic Information for CVE-2026-29070
Vulnerability Information
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Vulnerability Title
Open WebUI has unauthorized deletion of knowledge files
Source: NVD (National Vulnerability Database)
Vulnerability Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.8.6, an access control check is missing when deleting a file from a knowledge base. The only check being done is that the user has write access to the knowledge base (or is admin), but NOT that the file actually belongs to this knowledge base. It is thus possible to delete arbitrary files from arbitrary knowledge bases (as long as one knows the file id). Version 0.8.6 patches the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Open WebUI 安全漏洞
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 0.8.6之前版本存在安全漏洞，该漏洞源于从知识库删除文件时缺少访问控制检查，可能导致任意文件被删除。
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 | < 0.8.6 | - |
II. Public POCs for CVE-2026-29070
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · open-webui · 2026-03-26 · 4 CVEs total
| CVE-2026-28788 | 7.1 HIGH | Open WebUI's process_files_batch() endpoint missing ownership check, allows unauthorized f |
| CVE-2026-28786 | 4.3 MEDIUM | Open WebUI vulnerable to Path Traversal in `POST /api/v1/audio/transcriptions` |
| CVE-2026-29071 | 3.1 LOW | Open WebUI's Insecure Direct Object Reference (IDOR) allows access to other users' memorie |
IV. Related Vulnerabilities
Same product: open-webui
- CVE-2026-34225
Open WebUI has Blind Server Side Request Forgery in its Imag - CVE-2026-34222
Open WebUI has Broken Access Control in Tool Valves - CVE-2026-29071
Open WebUI's Insecure Direct Object Reference (IDOR) allows - CVE-2026-28788
Open WebUI's process_files_batch() endpoint missing ownershi - CVE-2026-28786
Open WebUI vulnerable to Path Traversal in `POST /api/v1/aud
Same vendor: open-webui
- CVE-2026-34225
Open WebUI has Blind Server Side Request Forgery in its Imag - CVE-2026-34222
Open WebUI has Broken Access Control in Tool Valves - CVE-2026-29071
Open WebUI's Insecure Direct Object Reference (IDOR) allows - CVE-2026-28788
Open WebUI's process_files_batch() endpoint missing ownershi - CVE-2026-28786
Open WebUI vulnerable to Path Traversal in `POST /api/v1/aud
Same weakness: CWE-862
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Kirby: `pages.access/list` and `files.access/list` permissio
V. Comments for CVE-2026-29070
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