CVE-2026-19274
Critical
Description
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.
SeverityCritical
CVSS9.6
Exploit probability—
Product
Ibm Observability With Instana Agent
PublishedSep 4, 2026
First seenSep 4, 2026
Weakness typeCWE-284Improper access control
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ibm observability_with_instana_agent | Build 1.0.303 ≤ v ≤ 1.0.323 | — |
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