Quick answers
- Is CVE-2026-73742 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-73742 being exploited in the wild.
- How severe is CVE-2026-73742?
- Medium severity, with a CVSS score of 4.3, published 1 September 2026.
- Which products and versions are affected?
- HPE Networking Fabric Composer.
- Is there a fix for CVE-2026-73742?
- 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-2026-73742 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-73742?
- 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 API request attribution spoofing issue in HPE Networking Fabric Composer, where an authenticated low-privilege operator user can craft requests to manipulate the source address attribution mechanism. The flaw resides in an API endpoint that fails to properly validate or enforce the source address of incoming requests, allowing an attacker to inject false source identifiers. Attack requires valid authentication credentials but no elevated privileges. Successful exploitation results in inaccurate audit log entries that misattribute actions to other users or systems, degrading accountability and forensic capabilities. Patches from HPE are expected to address this endpoint validation logic.
Affected products
- HPE Networking Fabric Composer
Timeline
- 2026-09-01: disclosed