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PatchSiren cyber security CVE debrief

CVE-2026-89419 OpenStack CVE debrief

OpenStack Ironic before 39.0.1 has a vulnerability allowing users to change the maintenance setting on a node via PATCH to /v1/nodes/{ident}, bypassing the specific maintenance endpoint. This issue has a CVSS score of 5 and is classified as MEDIUM severity. The vulnerability could lead to potential unauthorized changes to node maintenance settings, disrupting node maintenance and updates. Defenders should prioritize verifying and patching OpenStack Ironic deployments to prevent such unauthorized changes. The CVE record and NVD entry provide limited information, so further investigation is needed to determine the full scope of the issue.

Vendor
OpenStack
Product
Ironic
CVSS
MEDIUM 5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-23
Original CVE updated
2026-11-02
Advisory published
2026-10-23
Advisory updated
2026-11-02

Who should care

Defenders responsible for OpenStack Ironic deployments should assess exposure and prioritize patching to prevent potential unauthorized changes to node maintenance settings.

Why it matters

CVE-2026-89419 is a MEDIUM-severity vulnerability in OpenStack Ironic that allows users to change node maintenance settings, potentially disrupting node maintenance and updates. Defenders should prioritize verifying and patching OpenStack Ironic deployments.

  • Potential unauthorized changes to node maintenance settings
  • Possible disruption of node maintenance and updates
  • Need for verification of OpenStack Ironic version and patching
  • Potential impact on node availability and reliability

Technical summary

OpenStack Ironic before 39.0.1 allows users to change the maintenance setting on a node via PATCH to /v1/nodes/{ident}, which bypasses the specific maintenance endpoint. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.

Defensive priority

Defenders should prioritize verifying and patching OpenStack Ironic deployments to prevent potential unauthorized changes to node maintenance settings.

Recommended defensive actions

  • Verify OpenStack Ironic version and apply patch 39.0.1 if necessary
  • Review and restrict access to PATCH /v1/nodes/{ident} endpoint
  • Monitor node maintenance settings for unauthorized changes

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. Further investigation is needed to determine the full scope of the issue.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-89419 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-89419

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-89419 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-89419

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.