CVE-2026-39991 — Stored Cross-Site Scripting (XSS) in Note Station file upload functionality

CVE-2026-39991

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

Description (CNA)

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 (CNA)

Vendor / product	Versions
QNAP Systems Inc. / Notes Station 3	affected 3.9.x before 3.9.12

CWE

CWE-79

References

https://www.qnap.com/en/app-release-notes?keyword=Notes%20Station%203&app=NotesStation3&product-line=nas

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.