---
id: "CVE-2026-86574"
kind: "vulnerability"
aliases: ["CVE-2026-86574"]
title: "JP1/Base: heap buffer overflow may let an attacker run code"
severity: "critical"
cvss: 9.8
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["enterprise-ops", "hitachi", "jp1", "other"]
not_affected_if: ["version-12-50-54-or-later"]
published_at: "2026-10-27T10:16:56+00:00"
first_seen_at: "2026-10-27T10:31:03+00:00"
updated_at: "2026-10-27T10:31:33+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86574", "first_seen_at": "2026-10-27T10:31:03+00:00"}]
---

# JP1/Base: heap buffer overflow may let an attacker run code

JP1/Base versions 11-00 through 12-50-53 contain a heap-based buffer overflow. The sources do not say what triggers it or what an attacker gets beyond the memory corruption itself.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed JP1/Base version on each Hitachi JP1 host; the sources do not give the command or file to read it.
- unknown for any other check.

## Fix

- Move JP1/Base to `12-50-54` or later, per the affected range in the sources.
- unknown for any interim setting or workaround.

## Timeline

- 2026-10-27T10:31:03+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-86574

## From the sources

Heap-based Buffer Overflow Vulnerability in JP1/Base.

This issue affects JP1/Base: from 11-00 before 12-50-54.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_