CVE-2026-67567CWE-441

CVE-2026-67567

Critical · published August 21, 2026

CVSS v3.1
9.9
EPSS
1%
Percentile
49.1
In the wild
Unconfirmed
What it is

A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a tenant, who has the ability to create HelmRelease custom resources (CRs), to bypass existing security controls. The system's HelmRelease controller processes Helm chart templates using its own elevated ServiceAccount privileges without proper validation. This enables the tenant to deploy arbitrary resources across the entire cluster, leading to a significant security compromise.

The record
Technical detail
CVSS v3.1
9.9 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00620 · 49.1th percentile
Weakness
CWE-441 · Unintended Proxy or Intermediary ('Confused Deputy')
Published
2026-08-21T01:17Z
References (8)
EPSS history
Timeline
  • 20 AUG 20:34Z
    Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart applied with controller sa without gvk or namespace restriction
    cvelistv5