CVE-2026-89060Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references
Updated under an hour ago ()
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It affects Red Hat Advanced Cluster Management for Kubernetes 2.13. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.7 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
- Weakness (CWE)
- CWE-551
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
from 1789126264 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:67539vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:67540vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:67541vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:67542vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:67543vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-89060vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2531596issue-tracking, x-refsource-redhat
- https://github.com/stolostron/multicluster-observability-addon/pull/644
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.