Quick answers
- Is CVE-2026-101572 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-101572 being exploited in the wild.
- How severe is CVE-2026-101572?
- High severity, with a CVSS score of 7.5, published 20 October 2026.
- Which products and versions are affected?
- Oracle Helidon 4.0.0-4.5.5, 27.0.0.
- Is there a fix for CVE-2026-101572?
- 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-2026-101572 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-101572?
- Check whether you run Oracle Helidon 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
The vulnerability exists in the helidon-webclient-http2 component and can be triggered by an unauthenticated remote attacker with network access via HTTP/2 protocol. Successful exploitation results in denial of service through application hang or crash. The vulnerability requires no authentication, no user interaction, and affects Helidon versions 4.0.0 through 4.5.5 and 27.0.0.
Affected products
- Oracle Helidon 4.0.0-4.5.5, 27.0.0
Timeline
- 2026-10-20: disclosed