CVE-2026-97362: HFS2 denial of service via hung serving thread

CVE-2026-97362 · Severity: high · CVSS 7.5 · Published 2026-09-24

HFS2 is a file server that allows users to share files over HTTP. An unauthenticated attacker can send a single crafted request that causes the server to become completely unresponsive and stop serving all clients. The server requires manual restart by an operator to recover and cannot self-heal.

Technologies: Wgetnz HFS2. Vendors: Wgetnz.

Quick answers

Is CVE-2026-97362 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-97362 being exploited in the wild.
How severe is CVE-2026-97362?
High severity, with a CVSS score of 7.5, published 24 September 2026.
Which products and versions are affected?
Wgetnz HFS2 2.0.0 through 2.4.0.
Is there a fix for CVE-2026-97362?
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-2026-97362 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-97362?
Check whether you run Wgetnz HFS2 at an affected version. 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

HFS2 contains an infinite loop vulnerability (CWE-835) triggered by a crafted request that places a serving thread in a busy loop condition with no exit path. The vulnerability is unauthenticated and requires only network access to exploit. A successful exploit causes complete and persistent denial of service to all clients until the HFS2 process is manually restarted.

Affected products

  • wgetnz HFS2 2.0.0 through 2.4.0

Timeline

  • 2026-09-24: disclosed: CVE-2026-97362 published

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.