Improper Neutralization of Alternate XSS Syntax in Open WebUI - CVE-2026-45314
Published: May 11, 2026
Vulnerability identifier: #VU130937
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-45314
CWE-ID: CWE-87
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary JavaScript in the application's origin.
The vulnerability exists due to improper neutralization of alternate xss syntax in the profile image endpoint when processing webhook profile_image_url values containing svg data URLs. A remote user can supply a specially crafted svg payload in a webhook profile image to execute arbitrary JavaScript in the application's origin.
The Channels feature must be enabled, and user interaction is required because the malicious profile-image URL must be opened in a browser.
Affected software
Open WebUI
How to mitigate CVE-2026-45314
Install security update from vendor's website.
Open WebUI - update to 0.9.3