---
id: CVE-2026-115638
title: >-
  OpenStack Ironic through 39.0.1 allows a denial of service via a configdrive
  that results in a very large amount of uncompressed data, aka a gzip bomb.
summary: >-
  OpenStack Ironic through 39.0.1 allows a denial of service via a configdrive
  that results in a very large amount of uncompressed data, aka a gzip bomb.
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-409
vendor: OpenStack
product: Ironic
affected:
  - Ironic >= 30.0.0 <= 32.1.1
  - Ironic >= 33.0.0 <= 35.1.1
  - Ironic >= 36.0.0 <= 39.0.1
published: '2026-10-23'
updated: '2026-10-23'
sourceUpdated: '2026-10-23T03:21:17.303Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115638'
references:
  - url: 'https://bugs.launchpad.net/ironic/+bug/2171814'
tags:
  - cve.org
ingestedAt: '2026-10-23T04:15:07.559Z'
---

## Overview

OpenStack Ironic through 39.0.1 allows a denial of service via a configdrive that results in a very large amount of uncompressed data, aka a gzip bomb.

## Affected

- `Ironic >= 30.0.0 <= 32.1.1`
- `Ironic >= 33.0.0 <= 35.1.1`
- `Ironic >= 36.0.0 <= 39.0.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.