---
id: "CVE-2026-89419"
kind: "vulnerability"
aliases: ["CVE-2026-89419"]
title: "OpenStack Ironic: users can change node maintenance flag via PATCH"
severity: "medium"
cvss: 5.0
epss: 0.00288
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["bare-metal", "infrastructure", "ironic", "openstack", "self-hosted"]
not_affected_if: ["admin-only-api-access"]
published_at: "2026-10-23T04:18:19+00:00"
first_seen_at: "2026-10-23T21:57:32+00:00"
updated_at: "2026-10-25T04:29:21+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89419", "first_seen_at": "2026-10-23T21:57:32+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-89419", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# OpenStack Ironic: users can change node maintenance flag via PATCH

OpenStack Ironic before 39.0.1 sometimes lets a user set a node's maintenance mode through a PATCH to /v1/nodes/{ident} instead of the dedicated maintenance endpoint. An attacker with a user account can toggle maintenance on a bare-metal node, which bypasses the access control intended for that action.

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

## How to check

- Check the installed Ironic version with `ironic-api --version` or `pip show ironic` on the API host, and compare it to `39.0.1`
- Review who holds user roles on Ironic nodes, since the flaw needs an authenticated account

## Fix

- Upgrade OpenStack Ironic to `39.0.1` or later
- Until upgraded, restrict PATCH access to /v1/nodes/{ident} to trusted admin roles

## Timeline

- 2026-10-23T21:57:32+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-89419
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-89419

## From the sources

OpenStack Ironic before 39.0.1 sometimes allows a user to change the maintenance setting on a node via PATCH to /v1/nodes/{ident} - in other words, not using the specific maintenance endpoint.

---

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