What’s Vulnerable › Vulnerabilities
CVE-2026-29070: Open WebUI has unauthorized deletion of knowledge files
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-03-27 · updated 2026-06-17
- Weakness: CWE-862
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.
Affected products
- open-webui: before 0.8.6 — fixed in 0.8.6
How to fix
Upgrade to a fixed version: open-webui 0.8.6. Check the vendor advisory for mitigations.
References
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