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TI-2026-54649 Aliases CVE-2026-78600GHSA-pr5w-c42r-pmjr

Incomplete Cleanup in Elastic Cloud on Kubernetes Leading to Unauthorized Cross-Namespace Credential Retention

Priority LOW 17CWE-459Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Incomplete Cleanup (CWE-459) in Elastic Cloud on Kubernetes (ECK) can lead to unauthorized access via Privilege Abuse (CAPEC-122). Authentication credentials persist after a cross-namespace association has been denied by RBAC enforcement, allowing a low-privileged tenant to retain unauthorized read access to the associated Elasticsearch cluster.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00284 21st 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
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
ElasticEck Operator2.6.0 – 3.4.1—No fix listedCNA
  • Eck Operator VendorElastic Affected 2.6.0 – 3.4.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:elastic:elastic_cloud_on_kubernetes:*:*:*:*:*:*:*:*2.6.0 to before 3.5.0VulnerableElastic
  • cpe:2.3:a:elastic:elastic_cloud_on_kubernetes:*:*:*:*:*:*:*:* Versions 2.6.0 to before 3.5.0 Vulnerable ·Elastic

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-78600
  2. 2026-10-03 Alias added: GHSA-pr5w-c42r-pmjr

References

Advisory 1

  • TI-2020-05658 Elastic Cloud on Kubernetes (ECK) versions prior to 1.1.0 generate passwords using a weak… CVSS 3.1HIGH 7.5
  • TI-2023-15034 Elastic Cloud on Kubernetes (ECK) secret token configuration issue CVSS 3.1MEDIUM 5.3
  • TI-2026-50886 Cleartext Storage of Sensitive Information in an Environment Variable in Elastic Cloud on… CVSS 3.1MEDIUM 6.5
  • TI-2026-50879 Unintended Proxy or Intermediary in Elastic Cloud on Kubernetes Leading to Cross-Namespace Secret Disclosure CVSS 3.1MEDIUM 6.5
  • TI-2026-54658 Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data CVSS 3.1MEDIUM 5.4

Sources

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