---
id: CVE-2026-19274
title: >-
  IBM Observability with Instana (Agent) Build 1.0.303 through 1.0.323 IBM
  Instana Agent Operator could allow an authenticated Kubernetes tenant to
  hijack or permanently destroy another tenant's cluster-level RBAC permissions,
  caused by cl…
summary: >-
  IBM Observability with Instana (Agent) Build 1.0.303 through 1.0.323 IBM
  Instana Agent Operator could allow an authenticated Kubernetes tenant to
  hijack or permanently destroy another tenant's cluster-level RBAC permissions,
  caused by cl…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H'
cwe:
  - CWE-284
published: '2026-09-04'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T14:17:08.940'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19274'
references:
  - url: 'https://www.ibm.com/support/pages/node/7286070'
    label: psirt@us.ibm.com
tags:
  - nvd
epss: 0.0021
epssPercentile: 0.09983
ingestedAt: '2026-09-08T15:33:26.961Z'
---

## Overview

IBM Observability with Instana (Agent) Build 1.0.303 through 1.0.323 IBM Instana Agent Operator could allow an authenticated Kubernetes tenant to hijack or permanently destroy another tenant's cluster-level RBAC permissions, caused by cluster-scoped RBAC objects being keyed solely by the bare CR name with no namespace disambiguation, allowing a same-named `InstanaAgent` CR in an attacker-controlled namespace to silently overwrite the shared `ClusterRoleBinding` or delete it outright and revoke the victim agent's cluster monitoring access.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.