Authorization bypass through user-controlled key in Open WebUI - #VU152711
Published: September 28, 2026
Vulnerability identifier: #VU152711
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose directory structure information from inaccessible knowledge bases.
The vulnerability exists due to authorization bypass through a user-controlled key in knowledge base directory handling endpoints when submitting a directory id from a different knowledge base. A remote user can send a request containing a foreign directory id to disclose directory structure information from inaccessible knowledge bases.
Exploitation requires knowledge of a directory id in a knowledge base to which the user does not have access.
Affected software
Open WebUI
Remediation
Install security update from vendor's website.
Open WebUI - update to 0.11.4