CVE-2026-30974: 9001 Copyparty

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

Copyparty is a portable file server. Prior to v1.20.11., the nohtml config option, intended to prevent execution of JavaScript in user-uploaded HTML files, did not apply to SVG images. A user with write-permission could upload an SVG containing embedded JavaScript, which would execute in the context of whichever user opens it. This has been fixed in v1.20.11.

Affected products

• 9001 Copyparty: before 1.20.11 (fixed in 1.20.11)

Published 2026-03-10. Last modified 2026-06-17.