CVE-2026-115638

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-23 · updated 2026-10-29
Weakness: CWE-409

Description

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 products

OpenStack Ironic: from 30.0.0 through 32.1.1; from 33.0.0 through 35.1.1; from 36.0.0 through 39.0.1

References

https://bugs.launchpad.net/ironic/+bug/2171814
http://www.openwall.com/lists/oss-security/2026/10/29/1

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