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Vulnerabilities

Vulnerability · CVE-2026-115638

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.

Published Oct 23, 2026 · catalog updated Oct 23, 2026 · OpenStack Ironic through 39.0.1

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-115638. EPSS is 0.22%. Act only if a listed version of OpenStack Ironic through 39.0.1 is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (OpenStack Ironic through 39.0.1).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Not established
Affected products
See sources for product scope

Research mention from Openwall OSS Security. This is not vendor confirmation or proof of exploitation. CVE-2026-115638 is named on the public Openwall OSS Security page.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-115638

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-115638. EPSS is 0.22%. Act only if a listed version of OpenStack Ironic through 39.0.1 is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-409. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 23, 2026 · NIST NVD

    Detected

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-115638

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-115638

    30-day exploitation probability 0.22%

    first.org
  • NIST NVDVulnerability recordCVE-2026-115638

    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.

    nvd.nist.gov
  • Openwall OSS SecurityThreat researchCVE-2026-115638

    Research mention from Openwall OSS Security. Not confirmation of exploitation.

    openwall.com

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • Openwall OSS SecurityNov 3, 2026
  • CVE.orgOct 23, 2026
  • NIST NVDOct 23, 2026