CVE-2026-28786— Open WebUI vulnerable to Path Traversal in `POST /api/v1/audio/transcriptions`
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I. Basic Information for CVE-2026-28786
Vulnerability Information
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Vulnerability Title
Open WebUI vulnerable to Path Traversal in `POST /api/v1/audio/transcriptions`
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 unsanitized filename field in the speech-to-text transcription endpoint allows any authenticated non-admin user to trigger a `FileNotFoundError` whose message — including the server's absolute `DATA_DIR` path — is returned verbatim in the HTTP 400 response body, confirming information disclosure on all default deployments. 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:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
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，该漏洞源于语音转文字端点中未清理的文件名字段，可能导致信息泄露。
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-2026-28786
| # | 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-2026-29070 | 5.4 MEDIUM | Open WebUI has unauthorized deletion of knowledge files |
| 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-2026-29070
Open WebUI has unauthorized deletion of knowledge files - CVE-2026-28788
Open WebUI's process_files_batch() endpoint missing ownershi
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-2026-29070
Open WebUI has unauthorized deletion of knowledge files - CVE-2026-28788
Open WebUI's process_files_batch() endpoint missing ownershi
Same weakness: CWE-22
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Industrial Application Software IAS Canias ERP RMI iasReques - CVE-2026-42605
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V. Comments for CVE-2026-28786
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