Incorrect authorization in Open WebUI - #VU136845
Published: July 3, 2026
Vulnerability identifier: #VU136845
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open WebUI
Affected software:
Open WebUI
Open WebUI
Detailed vulnerability description
The vulnerability allows a remote user to modify or delete another user's file.
The vulnerability exists due to improper access control in model meta.knowledge file handling when attaching a readable file ID to an attacker-controlled workspace model. A remote user can create or update a model that references the file to modify or delete another user's file.
Exploitation requires Models workspace access and read-only access to the target file through a knowledge-base grant.
Remediation
Install security update from vendor's website.