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TI-2026-50879 Aliases CVE-2026-72640GHSA-vvr2-6gx7-cxv9

Unintended Proxy or Intermediary in Elastic Cloud on Kubernetes Leading to Cross-Namespace Secret Disclosure

Priority LOW 29CWE-441Published · Updated

Key facts

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

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

Summary

The Elastic Cloud on Kubernetes (ECK) operator reads a list of secret references from an annotation on secrets it manages, and it accepts the namespace recorded in each reference without validating that the reference is authorized for the resource being reconciled. A user whose Kubernetes permissions are limited to their own namespace can write that annotation, trigger a reconcile, and cause the operator to use its cluster-wide secret permissions to copy the contents of a secret from any other namespace into a secret the user can read.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00375 31st 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 Operator3.0.0 – 3.4.1—No fix listedCNA
  • Eck Operator VendorElastic Affected 3.0.0 – 3.4.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:elastic:elastic_cloud_on_kubernetes:*:*:*:*:*:*:*:*before 3.5.0VulnerableElastic
  • cpe:2.3:a:elastic:elastic_cloud_on_kubernetes:*:*:*:*:*:*:*:* Versions 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-2026-72640
  2. 2026-10-03 Alias added: GHSA-vvr2-6gx7-cxv9

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-2026-54658 Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data CVSS 3.1MEDIUM 5.4
  • 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