# CVE-2026-73737: HPE Networking Fabric Composer unauthenticated path traversal in API

Source: https://junglewise.ai/threats/cve-2026-73737-hpe-networking-fabric-composer-unauthenticated-path-traversal-in  
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-2026-73737 · Severity: medium · CVSS 4.8 · Published 2026-09-01

HPE Networking Fabric Composer is a network management platform used to configure and orchestrate fabric switches. This vulnerability allows unauthenticated attackers on an adjacent network segment to manipulate files through an API endpoint, potentially altering critical network configurations without proper authorization.

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-2026-73737 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-73737 being exploited in the wild.

**How severe is CVE-2026-73737?** Medium severity, with a CVSS score of 4.8, published 1 September 2026.

**Which products and versions are affected?** HPE Networking Fabric Composer.

**Is there a fix for CVE-2026-73737?** 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-2026-73737 attacked?** It is attacked from the adjacent network.

**Am I affected by CVE-2026-73737?** 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

The vulnerability is an unauthenticated path traversal flaw in an API endpoint of HPE Networking Fabric Composer. It allows attackers to bypass authentication controls and traverse the file system to access or manipulate user-generated files. The attack requires network adjacency but no authentication credentials. Successful exploitation could lead to unauthorized modifications of critical system configurations, though the advisory notes certain preconditions outside the attacker's control must be met. Patches are expected to be available from HPE.

## 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)