Quick answers
- Is CVE-2026-101590 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-101590 being exploited in the wild.
- How severe is CVE-2026-101590?
- Critical severity, with a CVSS score of 9.1, published 20 October 2026.
- Which products and versions are affected?
- Oracle Helidon 4.0.0 through 4.5.5.
- Is there a fix for CVE-2026-101590?
- 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-2026-101590 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-101590?
- 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
An easily exploitable authentication bypass exists in the helidon-microprofile-security component affecting versions 4.0.0 through 4.5.5. An unauthenticated attacker with network access via HTTP can bypass security controls to gain unauthorized read/write/delete access to application data. The vulnerability requires no user interaction and can be exploited remotely.
Affected products
- Oracle Helidon 4.0.0 through 4.5.5
Timeline
- 2026-10-20: disclosed