Quick answers
- Is CVE-2026-113808 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-113808 being exploited in the wild.
- How severe is CVE-2026-113808?
- High severity, with a CVSS score of 7.1, published 20 October 2026.
- Which products and versions are affected?
- Stormshield Network Security 5.1.0 to 5.1.3, 5.0.0 to 5.0.9, 4.8.0 to 4.8.19, 4.3.0 to 4.3.44.
- Is there a fix for CVE-2026-113808?
- Yes: fixed in Network Security 5.1.4 EA, 5.0.10, 4.8.20 LTSB, 4.3.45 QS. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-113808 attacked?
- It is attacked from the adjacent network, in a network appliance.
- Am I affected by CVE-2026-113808?
- 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: Network Security 5.1.4 EA, 5.0.10, 4.8.20 LTSB, 4.3.45 QS
Technical details
A stored cross-site scripting (XSS) vulnerability exists in the SNS enrollment portal's captive portal user creation functionality. The injected payload is stored and triggered during administrator validation, requiring user interaction but no authentication from the attacker. Successful exploitation allows arbitrary JavaScript execution in the administrator's browser context, enabling session hijacking or administrative actions.
Affected products
- Stormshield Network Security 5.1.0 to 5.1.3, 5.0.0 to 5.0.9, 4.8.0 to 4.8.19, 4.3.0 to 4.3.44
Timeline
- 2026-10-20: disclosed: Advisory published