Overly permissive cross-domain whitelist in Open WebUI - #VU130181
Published: May 5, 2026
Vulnerability identifier: #VU130181
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-942
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Open WebUI
Open WebUI
Software vendor:
Open WebUI
Open WebUI
Description
The vulnerability allows a remote attacker to bypass the CORS protection mechanism.
The vulnerability exists due to incorrect processing of the "Origin" HTTP header that is supplied within HTTP request and allow_credentials=True. A remote attacker can supply arbitrary value via the "Origin" HTTP header, bypass implemented CORS protection mechanism and perform cross-site scripting attacks against the vulnerable application.
Remediation
Install updates from vendor's website.