High severity · published May 15, 2026
CVE-2026-45301
Open WebUI: Missing permission check in files API allows authenticated users to list, access and delete every uploaded file
8.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
open-webui · open-webui
< 0.3.16 · source: vendor
OW
Open Webui · Openwebui
before 0.3.16 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45301
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-45301
Exploit
https://github.com/open-webui/open-webui/security/advisories/GHSA-r8wh-8m7r-fh33
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