CVE-2026-50040 Cross-site Scripting in StoneFly Storage Concentrator
Reflected XSS in StoneFly Storage Concentrator allows attackers to execute scripts in authenticated users' browsers, potentially stealing sessions or performing unauthorized actions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-50040?
CVE-2026-50040 is a medium-severity cross-site scripting vulnerability in StoneFly Storage Concentrator, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Storage Concentrator (SC & SCVM) is vulnerable to reflected cross-site scripting due to unsanitized content being echoed back in 404 error pages. An attacker can craft a malicious URL that, when visited by an authenticated user, causes arbitrary script content to execute within the victim's browser session in the context of the application. This could be leveraged to steal session cookies, redirect users, or perform unauthorized actions on behalf of the victim.
Weakness: CWE-79
Which versions are affected by CVE-2026-50040?
How do I fix CVE-2026-50040?
No fix has been published for CVE-2026-50040 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-2026-50040 being exploited?
There is no known exploitation of CVE-2026-50040 in the wild and no public exploit code.
Sources
Also known as GHSA-8h25-3425-5fgh.