Quick answers
- Is CVE-2026-73731 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-73731 being exploited in the wild.
- How severe is CVE-2026-73731?
- Medium severity, with a CVSS score of 6.1, published 1 September 2026.
- Which products and versions are affected?
- HPE Networking Fabric Composer.
- Is there a fix for CVE-2026-73731?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-73731 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-73731?
- Check whether you run Arubanetworks Fabric Composer or Hpe Networking Fabric Composer. 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.
Technical details
This is a reflected cross-site scripting (XSS) vulnerability in the web-based management interface of HPE Networking Fabric Composer. The vulnerability allows an unauthenticated remote attacker to inject arbitrary script code that executes in a victim's browser within the context of the affected interface. Attack vector is network-based and requires no authentication, but typically requires user interaction (victim must click a malicious link). A successful exploit could enable session hijacking, credential theft, or unauthorized administrative actions on the managed network fabric.
Affected products
- HPE Networking Fabric Composer
Timeline
- 2026-09-01: disclosed