CVE-2026-113810: Stormshield Network Security stored XSS in enrollment portal

CVE-2026-113810 · Severity: high · CVSS 7 · Published 2026-10-20

A stored cross-site scripting (XSS) vulnerability exists in Stormshield Network Security's enrollment portal, allowing an attacker to inject malicious scripts when requesting certificate creation. The injected code is executed when an administrator validates the request, potentially enabling account takeover, credential theft, or unauthorized administrative actions. No workaround is available; affected organizations must upgrade to patched versions.

Technologies: Stormshield Network Security. Vendors: Stormshield.

Quick answers

Is CVE-2026-113810 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-113810 being exploited in the wild.
How severe is CVE-2026-113810?
High severity, with a CVSS score of 7, published 20 October 2026.
Which products and versions are affected?
Stormshield Network Security 4.8.0 to 4.8.19, 5.0.0 to 5.0.9, 5.1.0 to 5.1.3.
Is there a fix for CVE-2026-113810?
Yes: fixed in SNS 4.8.20 LTSB, SNS 5.0.10, SNS 5.1.4 EA. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-113810 attacked?
It is attacked with local access.
Am I affected by CVE-2026-113810?
Check whether you run Stormshield Network Security at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: SNS 4.8.20 LTSB, SNS 5.0.10, SNS 5.1.4 EA

Technical details

A stored XSS vulnerability in the SNS enrollment API captive portal permits injection of JavaScript when submitting certificate creation requests. The payload is triggered during administrator validation of the request, requiring user interaction from an authorized admin. An attacker with network access to the enrollment portal can inject arbitrary JavaScript that runs with administrator privileges, potentially leading to session hijacking or sensitive data exposure.

Affected products

  • Stormshield Network Security 4.8.0 to 4.8.19, 5.0.0 to 5.0.9, 5.1.0 to 5.1.3

Timeline

  • 2026-09-20: disclosed
  • 2026-10-20: advisory

References

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