TI-2026-79553 Aliases CVE-2026-115638 GHSA-48wg-78rx-fcjg

Denial of service in OpenStack Ironic via gzip bomb configdrive

LOW 19CWE-409Published 2026-10-23 · Updated 2026-10-29

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · Low
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

OpenStack Ironic from 30.0.0 through 32.1.1, from 33.0.0 through 35.1.1, and from 36.0.0 through 39.0.1 is affected. A configdrive can expand into a very large amount of uncompressed data, which is a gzip bomb (CWE-409). A remote attacker with low privileges can cause a denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00221 12th percentileScored 2026-11-07

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OpenStack	Ironic	30.0.0 – 32.1.1; 33.0.0 – 35.1.1; 36.0.0 – 39.0.1	—	No fix listed	CNA

Ironic VendorOpenStack Affected 30.0.0 – 32.1.1; 33.0.0 – 35.1.1; 36.0.0 – 39.0.1 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:openstack:ironic::::::::	—	—	OpenStack

cpe:2.3:a:openstack:ironic:*:*:*:*:*:*:*:* Versions — — ·OpenStack

Remediation

The sources list no fixed version for OpenStack Ironic. Red Hat lists these products as affected with no fix available: Red Hat OpenShift Container Platform 4, Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1 and Red Hat OpenStack Platform 18.0.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat OpenShift Container Platform 4	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 13 (Queens)	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 16.2	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 17.1	Affected	No fix yet: Fix deferred
Red Hat OpenStack Platform 18.0	Affected	No fix yet: Fix deferred

Timeline

2026-10-23 Threatist record created from CVE-2026-115638
2026-10-23 Alias added: GHSA-48wg-78rx-fcjg
2026-10-26 CISA SSVC decision points changed
2026-11-03 Affected versions changed · Red Hat
2026-11-03 CVSS score added · Red Hat

References

Other 1

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

TI-2026-78562 Incorrect authorization in OpenStack Manila share operations CVSS 3.1CRITICAL 9.9
TI-2026-63467 Code injection in OpenStack Octavia CVSS 4.0CRITICAL 9.4
TI-2017-13226 The tcpmss_mangle_packet function in net/netfilter/xt_TCPMSS.c in the Linux kernel before… CVSS 3.1CRITICAL 9.8
TI-2026-69629 OpenStack Mistral flaw lets users change other projects' resources CVSS 4.0HIGH 7.2
TI-2026-69623 Command injection in OpenStack Mistral std.ssh_proxied action CVSS 4.0HIGH 8.7
TI-2022-17779 Improper privilege management in OpenStack CVSS 3.1HIGH 8.8

See all 332 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences