CVE-2026-45314: Openwebui Open Webui

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.3, the channel webhook create/update flow accepts arbitrary profile_image_url values, including data:image/svg+xml;base64,... payloads. The profile image endpoint then decodes and serves this SVG as image/svg+xml without sanitization, allowing attacker-controlled script handlers (for example onload) to execute when the profile-image URL is opened in the browser. This vulnerability is fixed in 0.9.3.

Affected products

• Openwebui Open Webui: before 0.9.3 (fixed in 0.9.3)

Published 2026-05-15. Last modified 2026-06-17.