Authorization bypass through user-controlled key in Open WebUI - #VU130242
Published: May 6, 2026
Vulnerability identifier: #VU130242
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-639
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 disclose sensitive information and modify other users' memories.
The vulnerability exists due to improper access control in the memories API when handling requests to memory query, update, and delete endpoints. A remote user can send crafted API requests using another user's memory identifier to disclose sensitive information and modify other users' memories.
The issue can expose memory contents and associated user ID values, and deleted memories can be restored through the update endpoint.
Remediation
Install security update from vendor's website.