Quick answers
- Is CVE-2026-101586 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-101586 being exploited in the wild.
- How severe is CVE-2026-101586?
- Medium severity, with a CVSS score of 5.3, 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-2026-101586?
- 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-2026-101586 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-101586?
- 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
A network-accessible information disclosure vulnerability exists in the helidon-webclient component of Oracle Helidon affecting versions 4.0.0 through 4.5.5 and 27.0.0. The vulnerability allows unauthenticated attackers with network access via HTTP to read a subset of Helidon-accessible data, with no user interaction or special privileges required. The issue has been patched in newer versions.
Affected products
- Oracle Helidon 4.0.0-4.5.5, 27.0.0
Timeline
- 2026-10-20: disclosed