What is CVE-2026-115638?

CVE-2026-115638 is a medium-severity vulnerability in OpenStack Ironic, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 4.3/10. Published 2026-10-23.

How severe is CVE-2026-115638?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in OpenStack Ironic

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 2026-10-23 · last modified 2026-10-23.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

OpenStack Ironic

Weakness classification (CWE)

CWE-409 — Improper Handling of Highly Compressed Data (Data Amplification)

References

bugs.launchpad.net/ironic/+bug/2171814

Frequently asked questions

What is CVE-2026-115638?: CVE-2026-115638 is a medium-severity vulnerability in OpenStack Ironic, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 4.3/10. Published 2026-10-23.
How severe is CVE-2026-115638?: Medium severity. CVSS v3 base score is 4.3 out of 10.