CVE-2026-72583: Fastschema

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

A stored cross-site scripting (XSS) vulnerability in fastschema through v0.15.1 allows a low-privileged authenticated user to upload an SVG file containing malicious JavaScript by bypassing the MIME type allow-list check.

Affected products

• Fastschema Fastschema: up to and including 0.15.1

Published 2026-08-10. Last modified 2026-08-28.