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TI-2026-54658 Aliases CVE-2026-78609GHSA-h699-694r-9xxf

Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data

Priority LOW 23CWE-863Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

Incorrect Authorization (CWE-863) in Elastic Cloud on Kubernetes (ECK) can lead to unauthorized modification of data via Metadata Spoofing (CAPEC-690). An actor holding limited Kubernetes permissions confined to a single namespace could cause attacker-controlled certificate material to be included in the Elasticsearch client trust bundle managed by ECK in a separate namespace.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0015 4th 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-2026-78609
  2. 2026-10-03 Alias added: GHSA-h699-694r-9xxf

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-2026-54649 Incomplete Cleanup in Elastic Cloud on Kubernetes Leading to Unauthorized Cross-Namespace Credential Retention CVSS 3.1LOW 3.5

Sources

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