What is CVE-2026-8474?

CVE-2026-8474 is a medium-severity vulnerability in Stormshield Network Security, classified under Cross-site Scripting. CVSS score: 5.3/10. Published 2026-06-01.

How severe is CVE-2026-8474?

Medium severity. CVSS v3 base score is 5.3 out of 10.

XSS in Stormshield Network Security

CVE-2026-8474

A vulnerability was discovered on Stormshield Network Security * 4.3.0 to 4.3.41, * 4.8.0 to 4.8.15, * 5.0.0 to 5.0.5 It is possible to execute a reflected XSS attack on the login API available on Stormshield SNS a…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (9.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Stormshield Network Security — versions 4.3.0, 4.8.0, 5.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cert@airbus.com

Frequently asked questions

What is CVE-2026-8474?: CVE-2026-8474 is a medium-severity vulnerability in Stormshield Network Security, classified under Cross-site Scripting. CVSS score: 5.3/10. Published 2026-06-01.
How severe is CVE-2026-8474?: Medium severity. CVSS v3 base score is 5.3 out of 10.