CVE-2026-8474

Possible to run a Cross Site Scripting request on the login API available on Stormshield SNS appliances.

Published Jun 1, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
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 appliance by executing a script on the victim's machine. The risks include the theft of cookies or other sensitive data, as well as the modification of page behavior, for example, by redirecting the victim to malicious websites.

Remediation

Vendor Solution

The following updates fix this vulnerability: * SNS 5.0.6 * SNS 4.8.16 * SNS 4.3.42

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Stormshield
Stormshield stormshield Network Security
Vendors & Products Stormshield
Stormshield stormshield Network Security
Type Values Removed Values Added
Description 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 appliance by executing a script on the victim's machine. The risks include the theft of cookies or other sensitive data, as well as the modification of page behavior, for example, by redirecting the victim to malicious websites.
Title Possible to run a Cross Site Scripting request on the login API available on Stormshield SNS appliances.
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
airbus
Published
Updated
Jun 1, 2026, 1:05 PM
Reserved
May 13, 2026, 1:10 PM
Status
Deferred
Published
Jun 1, 2026, 9:16 AM
Modified
Jul 22, 2026, 7:10 AM