Server-Side Request Forgery (SSRF) in Open WebUI - #VU140757
Published: August 3, 2026
Vulnerability identifier: #VU140757
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause the victim's browser to send attacker-chosen outbound requests and disclose response data from same-origin or CORS-permissive targets.
The vulnerability exists due to server-side request forgery in Vega/Vega-Lite chart rendering when rendering untrusted vega or vega-lite chat content in the viewer's browser. A remote user can place a specially crafted chart specification where the victim will view it to cause the victim's browser to send attacker-chosen outbound requests and disclose response data from same-origin or CORS-permissive targets.
User interaction is required because the victim must open the message containing the crafted chart.
Affected software
Open WebUI
Remediation
Install security update from vendor's website.
Open WebUI - update to 0.11.0