Vulnerability · Published May 15, 2026 · Assigned by GitHub_M

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

High 8.1

In plain English

A high-severity improper access control in open-webui from open-webui. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.3%top 80.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	open-webui	0.3.16	GHSA-r8wh-8m7r-fh33
PyPI	open-webui	0.3.16	PYSEC-2026-2753

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	< 0.3.16

Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

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