CVE-2026-45314 | THREATINT

Description

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.

PUBLISHED Reserved 2026-05-11 | Published 2026-05-15 | Updated 2026-05-18 | Assigner GitHub_M

HIGH: 7.4CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-87: Improper Neutralization of Alternate XSS Syntax

Product status

< 0.9.3

affected

References

github.com/...-webui/security/advisories/GHSA-3856-3vxq-m6fc exploit

github.com/...-webui/security/advisories/GHSA-3856-3vxq-m6fc

cve.org (CVE-2026-45314)

nvd.nist.gov (CVE-2026-45314)

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