CVE-2026-89060

A cross-namespace authorization flaw in multicluster-observability-addon allows a user with permission to modify a managed cluster’s ManagedClusterAddOn configuration to reference ClusterLogForwarder or OpenTelemetryCollector resources outside the permitted namespace. If those resources reference Secrets, the add-on may copy the referenced Secrets to the attacker-controlled managed cluster.

CVSS v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:67539
https://access.redhat.com/errata/RHSA-2026:67540
https://access.redhat.com/errata/RHSA-2026:67541
https://access.redhat.com/errata/RHSA-2026:67542
https://access.redhat.com/errata/RHSA-2026:67543
https://access.redhat.com/security/cve/CVE-2026-89060
https://bugzilla.redhat.com/show_bug.cgi?id=2531596
https://github.com/stolostron/multicluster-observability-addon/pull/644

Configurations

No configuration.

History

21 Sep 2026, 12:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:67539 - () https://access.redhat.com/errata/RHSA-2026:67540 - () https://access.redhat.com/errata/RHSA-2026:67541 - () https://access.redhat.com/errata/RHSA-2026:67542 - () https://access.redhat.com/errata/RHSA-2026:67543 -

Information

Published : 2026-09-11 05:16

Updated : 2026-09-21 12:17

NVD link : CVE-2026-89060

Mitre link : CVE-2026-89060

CVE.ORG link : CVE-2026-89060

JSON object : View

Products Affected

No product.

CWE

CWE-551

Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

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