{"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":0.11512,"ingestedAt":"2026-09-08T15:33:26.961Z","slug":"CVE-2026-19274","body":"## Overview\n\nIBM 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":52.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}