Medium severity · published Oct 23, 2026
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
New
4.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IR
Ironic · OpenStack
30.0.0 through 32.1.1; 33.0.0 through 35.1.1; 36.0.0 through 39.0.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-115638
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-115638
bugs.launchpad.net
https://bugs.launchpad.net/ironic/+bug/2171814
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