CVE-2026-47790 Privilege Escalation via QuFTP Log-based XSS
Remote attackers with user accounts can inject malicious code via XSS in QuFTP Service, leading to privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-47790?
CVE-2026-47790 is a medium-severity cross-site scripting vulnerability in QNAP Systems Inc. QuFTP Service, published on 15 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A cross-site scripting (XSS) vulnerability has been reported to affect QuFTP Service. 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: QuFTP Service 1.4.6 and later QuFTP Service 1.5.5 and later QuFTP Service 1.6.5 and later
Weakness: CWE-79
Which versions are affected by CVE-2026-47790?
How do I fix CVE-2026-47790?
No fix has been published for CVE-2026-47790 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-47790 being exploited?
There is no known exploitation of CVE-2026-47790 in the wild and no public exploit code.
Sources
Also known as GHSA-g9jq-pqxh-j9mj.