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CVE-2026-115638

Vulnerability in OpenStack Ironic

CVSS score

4.3

EPSS probability

—

Risk score

0.4

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Denial‑of‑Service Vulnerability in OpenStack Ironic (CVE-2026-115638)

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

OpenStack Ironic versions up to 39.0.1 can be forced into a denial‑of‑service condition by delivering a configdrive that expands into a very large amount of uncompressed data (gzip bomb). CVSS 4.3, MEDIUM severity. No active exploitation reported and patch status is unknown.

Why does it matter?

A DoS can interrupt Ironic service and cause delays in cloud‑infrastructure management.

What should be done?

  • Patch status is unknown; follow the vendor advisory when released.
  • Enforce limits on configdrive size and compression ratio.
  • Monitor resource usage for abnormal spikes.
  • Consider upgrading to an unaffected version if available.
Chain of evidence and sources3 verified claims

CVE-2026-115638, OpenStack Ironic 30.0.0‑39.0.1 sürümlerinde configdrive üzerinden gzip bomb gönderilerek hizmet reddine (DoS) yol açar.

S0 · daybreach-canonicalS1 · cvelist

Bu açık için CISA KEV listesinde aktif istismar rapor edilmemiştir ve yama durumu UNKNOWN olarak değerlendirilmiştir.

S0 · daybreach-canonical

Açığın CVSS v3.1 skoru 4.3, MEDIUM şiddetindedir.

S0 · daybreach-canonical
Show the technical text from the sources

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

CWE: CWE-409

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-115638 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1openstackironic View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
4.3CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LCVE CNA
4.3CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-115638 is associated with the following CWEs:

CWE-409: Common Weakness Enumeration Entry CWE-409

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-115638 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

https://bugs.launchpad.net/ironic/+bug/2171814vendor-advisory

CVSS Vector Radar Chart

4.3 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-409

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CVE-2026-115638 · Vulnerability in OpenStack Ironic