What is CVE-2026-50040?

CVE-2026-50040 is a medium-severity vulnerability in Stonefly Storage Concentrator, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-06-30.

How severe is CVE-2026-50040?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Stonefly Storage Concentrator

CVE-2026-50040

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 arb…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Stonefly Storage Concentrator — versions 0, 8.0.4.29
Stonefly Storage Concentrator Virtual Machine — versions 0, 8.0.4.29

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov

Frequently asked questions

What is CVE-2026-50040?: CVE-2026-50040 is a medium-severity vulnerability in Stonefly Storage Concentrator, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-06-30.
How severe is CVE-2026-50040?: Medium severity. CVSS v3 base score is 6.1 out of 10.