Quick answers
- Is CVE-2026-101569 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-101569 being exploited in the wild.
- How severe is CVE-2026-101569?
- Medium severity, with a CVSS score of 6.5, 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-2026-101569?
- 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-2026-101569 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-101569?
- 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
This is an authorization flaw in the helidon-common-concurrency-limits component affecting versions 4.0.0 through 4.5.5 and 27.0.0. An unauthenticated attacker can send specially crafted HTTP requests over the network to bypass access controls, resulting in unauthorized data modification, insertion, deletion, and partial denial of service. The vulnerability is easily exploitable with no preconditions beyond network access.
Affected products
- Oracle Helidon 4.0.0-4.5.5, 27.0.0
Timeline
- 2026-10-20: disclosed