CVE-2026-89060 PUBLISHED

Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references

Assigner: redhat
Reserved: 10.09.2026 Published: 11.09.2026 Updated: 11.09.2026

A flaw was found in multicluster-observability-addon. This vulnerability allows a managed-cluster identity to reference configuration resources outside its designated namespace. This can lead to the disclosure of sensitive hub Secrets to an attacker-controlled managed cluster.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS Score: 7.7

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Red Hat
Product	Red Hat Advanced Cluster Management for Kubernetes 2
Versions	Default: affected

References

Problem Types

Incorrect Behavior Order: Authorization Before Parsing and Canonicalization CWE