CVE-2026-89060 multicluster-observability-addon - Broken Access Control

multicluster-observability-addon contains a broken access control vulnerability caused by managed-cluster identity referencing configuration resources outside its namespace, letting attacker-controlled managed clusters disclose sensitive hub Secrets, exploit requires attacker-controlled managed cluster.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.47% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Published
11 September 2026
Updated
15 October 2026
Weakness
CWE-551

Vendor fix

Update to the latest version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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