CVE-2026-73742 Improper Client Address Validation allows Request Attribution Spoofing in Fabric Composer API Endpoint
An authenticated low-privilege user can spoof source addresses in HPE Fabric Composer, causing inaccurate request attribution records.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73742?
CVE-2026-73742 is a medium-severity vulnerability in Arubanetworks Fabric Composer, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in an API endpoint of HPE Networking Fabric Composer could allow an authenticated low privilege operator user to spoof the source address attributed to their requests. Successful exploitation could allow an attacker to cause inaccurate attribution information to be recorded on the affected system.
Weakness: CWE-290
Which versions are affected by CVE-2026-73742?
It affects 1 product.
Products include Arubanetworks Fabric Composer.
How do I fix CVE-2026-73742?
No fix has been published for CVE-2026-73742 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-73742 being exploited?
There is no known exploitation of CVE-2026-73742 in the wild and no public exploit code.
Other vulnerabilities in Arubanetworks Fabric Composer
- CVE-2026-76657 Authentication Bypass in HPE Networking Fabric Composer API allows Administrative Access
- CVE-2026-76658 Unauthenticated Remote Code Execution in HPE Networking Fabric Composer SSH Daemon
- CVE-2026-19766 Authentication Bypass leads to Administrative control of adjacent network hosts in HPE Networking Fabric Composer
- CVE-2026-73700 Cross-site scripting in Fabric Composer
- CVE-2026-73701 Unauthenticated Remote Code Execution in HPE Networking Fabric Composer
Sources
Also known as GHSA-365r-j26r-xggv.