CVE-2026-29070
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductOpenwebui Open Webui
PublishedMar 27, 2026
First seenMar 27, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- openwebui open_webui0.8.6 or later
- open-webui0.8.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openwebui open_webui | v < 0.8.6 | 0.8.6 |
| open-webuiPyPI | v < 0.8.6 | 0.8.6 |
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