Is CVE-2026-86574 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-86574 being exploited in the wild.

How severe is CVE-2026-86574?

Critical severity, with a CVSS score of 9.8, published 27 October 2026.

Which products and versions are affected?

Hitachi JP1/Base Linux, Solaris, HP-UX: 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-35, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53; AIX: 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-34, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53.

Is there a fix for CVE-2026-86574?

Yes: fixed in JP1/Base 12-50-54, 11-50-36 (Linux, AIX, HP-UX, Solaris). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-86574 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-86574?

Check whether you run Hitachi JP1/Base 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.

CVE-2026-86574: Hitachi JP1/Base heap-based buffer overflow

CVE-2026-86574 · Severity: critical · CVSS 9.8 · Published 2026-10-27

JP1/Base is a job scheduling and system management platform used to automate enterprise operations. A heap-based buffer overflow in JP1/Base allows remote attackers to execute arbitrary code and gain full control of affected systems without authentication. This vulnerability poses a critical risk to organizations relying on JP1/Base for business-critical automation and could lead to complete system compromise, data theft, or service disruption.

Technologies: Hitachi JP1/Base. Vendors: Hitachi.

Quick answers

Is CVE-2026-86574 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-86574 being exploited in the wild.
How severe is CVE-2026-86574?: Critical severity, with a CVSS score of 9.8, published 27 October 2026.
Which products and versions are affected?: Hitachi JP1/Base Linux, Solaris, HP-UX: 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-35, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53; AIX: 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-34, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53.
Is there a fix for CVE-2026-86574?: Yes: fixed in JP1/Base 12-50-54, 11-50-36 (Linux, AIX, HP-UX, Solaris). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-86574 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-86574?: Check whether you run Hitachi JP1/Base 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.

How to fix

Fixed in: JP1/Base 12-50-54, 11-50-36 (Linux, AIX, HP-UX, Solaris)

Technical details

A heap-based buffer overflow vulnerability exists in JP1/Base versions before 12-50-54 and 11-50-36. The vulnerability is remotely exploitable without authentication or user interaction (CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), allowing unauthenticated remote attackers to execute arbitrary code and achieve complete system compromise with high impact on confidentiality, integrity, and availability.

Affected products

Hitachi JP1/Base Linux, Solaris, HP-UX: 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-35, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53; AIX: 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-34, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53

Timeline

2026-10-27: disclosed

References

https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-156/index.html

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