# CVE-2026-101579: Oracle Helidon gRPC server unauthorized data access via HTTP/2

Source: https://junglewise.ai/threats/cve-2026-101579-vulnerability-in-the-helidon-product-of-oracle-fusion-middleware  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-101579 · Severity: high · CVSS 7.2 · Published 2026-10-20

Oracle Helidon, a framework for building cloud-native Java applications, contains a vulnerability in its gRPC server component that allows remote attackers to read and modify sensitive data without authentication. An attacker with network access can exploit this flaw over HTTP/2 to compromise data confidentiality and integrity, potentially affecting dependent applications that rely on Helidon services.

Technologies: [Oracle Helidon](https://junglewise.ai/threats/technologies/helidon). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-101579 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-101579 being exploited in the wild.

**How severe is CVE-2026-101579?** High severity, with a CVSS score of 7.2, published 20 October 2026.

**Which products and versions are affected?** Oracle Helidon 3.0.0-3.2.21.

**Is there a fix for CVE-2026-101579?** 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-2026-101579 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-101579?** 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 unauthenticated, easily exploitable vulnerability in the helidon-grpc-server component allows remote attackers to bypass authentication via HTTP/2 network access, resulting in unauthorized read and write access to Helidon-accessible data. The vulnerability affects versions 3.0.0 through 3.2.21. Scope is marked as changed, indicating that successful exploitation may impact systems beyond Helidon itself.

## Affected products

- Oracle Helidon 3.0.0-3.2.21

## Timeline

- 2026-10-20: disclosed

## References

- [https://www.oracle.com/security-alerts/cpuoct2026.html](https://www.oracle.com/security-alerts/cpuoct2026.html)

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