# CVE-2026-73731: HPE Networking Fabric Composer reflected XSS in web management interface

Source: https://junglewise.ai/threats/cve-2026-73731-hpe-networking-fabric-composer-reflected-xss-in-web-management  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-01. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-73731 · Severity: medium · CVSS 6.1 · Published 2026-09-01

HPE Networking Fabric Composer is a web-based management platform for network fabric infrastructure. An unauthenticated attacker can exploit a reflected cross-site scripting (XSS) vulnerability to inject malicious scripts into the management interface, potentially compromising administrator sessions and allowing unauthorized control of the network infrastructure.

Technologies: [Arubanetworks Fabric Composer](https://junglewise.ai/threats/technologies/fabric-composer), [Hpe Networking Fabric Composer](https://junglewise.ai/threats/technologies/networking-fabric-composer). Vendors: [Arubanetworks](https://junglewise.ai/threats/vendors/arubanetworks), [Hpe](https://junglewise.ai/threats/vendors/hpe).

## 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

## References

- [https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05133en_us&docLocale=en_US](https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05133en_us&docLocale=en_US)

## Related threats

- [HPE Networking Fabric Composer API race condition](https://junglewise.ai/threats/cve-2026-95772-a-race-condition-vulnerability-exists-in-the-api-of-hpe)
- [HPE Networking Fabric Composer information disclosure in API](https://junglewise.ai/threats/cve-2026-95771-an-authenticated-information-disclosure-vulnerability-exists-in)
- [HPE Networking Fabric Composer information disclosure in OS](https://junglewise.ai/threats/cve-2026-95770-a-sensitive-information-disclosure-vulnerability-in-the)
- [HPE Networking Fabric Composer audit log spoofing](https://junglewise.ai/threats/cve-2026-95769-an-audit-log-spoofing-vulnerability-exists-in-the-api-of-hpe)
- [HPE Networking Fabric Composer API privilege escalation](https://junglewise.ai/threats/cve-2026-95768-a-privilege-escalation-vulnerability-exists-in-the-api-of-hpe)