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TI-2026-67830 Aliases CVE-2026-101919GHSA-9pmf-w27v-pwpg

Unsanitized kubeconfig passthrough in HyperShift operator

Priority MEDIUM 40CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

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

Summary

The HyperShift operator in Red Hat Multicluster Engine for Kubernetes copies user-provided kubeconfig secrets into the privileged control plane namespace without validation. Improper input validation (CWE-20) lets a kubeconfig containing unauthorized executable plugins pass through unchanged. An authenticated user with cluster and secret creation permissions can achieve arbitrary code execution within the control plane when downstream controllers consume that configuration.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A flaw was found in the HyperShift operator. The operator copies user-provided Kubernetes configuration (kubeconfig) secrets directly into the privileged control plane namespace without proper validation or sanitization. An authenticated user with cluster and secret creation permissions can exploit this vulnerability by supplying a configuration containing unauthorized executable plugins. When downstream controllers consume this configuration, an attacker can achieve arbitrary code execution within the control plane.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00422 36th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatMulticluster Engine for Kubernetes——No fix listedCNA
  • Multicluster Engine for Kubernetes VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:/a:redhat:multicluster_engine——Red Hat
  • cpe:/a:redhat:multicluster_engine Versions — — ·Red Hat

Remediation

The sources list no fixed version for Multicluster Engine for Kubernetes.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Multicluster Engine for KubernetesAffectedNo fix yet

Timeline

  1. 2026-10-05 Threatist record created from CVE-2026-101919
  2. 2026-10-05 Alias added: GHSA-9pmf-w27v-pwpg
  3. 2026-10-06 Affected versions changed · Red Hat
  4. 2026-10-06 CVSS score added · Red Hat
  5. 2026-10-07 Priority changed: MEDIUM → LOW
  6. 2026-10-07 CISA SSVC decision points changed
  7. 2026-10-07 Priority changed: LOW → MEDIUM

References

Other 2

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

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