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Medium · 4.8 CVE-2026-39991 EUVD-2026-101986GHSA-gm69-cjmx-9r3x

Stored Cross-Site Scripting (XSS) in Note Station file upload functionality

Published Oct 15, 2026 · Updated Oct 29, 2026 · Assigned by qnap

Description

A cross-site scripting (XSS) vulnerability has been reported to affect Notes Station 3. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code.

We have already fixed the vulnerability in the following version:
Notes Station 3 3.9.12 and later

Affected products

VendorProductAffectedFixed
QNAP Systems Notes Station 3 3.9.x – < 3.9.12 3.9.12

References