Critical severity · published May 15, 2026
CVE-2026-44566
Open WebUI: Arbitrary File Upload and Path Traversal
9.8
CVSS
0.3%
EPSS
No
On KEV
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.1.124, when attaching files to a promp, the name of the file is derived from the original HTTP upload request and is not validated or sanitized. This allows for users to upload files with names containing dot-segments in the file path and traverse out of the intended uploads directory. Effectively, users can upload files anywhere on the filesystem the user running the web server has permission. This vulnerability is fixed in 0.1.124.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
open-webui · open-webui
< 0.1.124 · source: vendor
OW
Open Webui · Openwebui
before 0.1.124 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44566
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44566
Exploit
https://github.com/open-webui/open-webui/security/advisories/GHSA-9pgh-j74g-qj6m
More from open-webui
9.6
CVE-2026-56400
open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation
9.1
CVE-2026-44551
Open WebUI: LDAP Empty Password Authentication Bypass
9.0
CVE-2026-56398
Open WebUI - Stored Cross-Site Scripting via OAuth Picture Claim SVG Data URI
9.0
CVE-2026-59216
Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event-caller session_id
9.0
CVE-2026-59214
Open WebUI: Stored web worker XSS via Pyodide