CVE-2026-89060
Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references
No known exploitation. EPSS puts it in the 38th percentile. Only a workaround so far.
What to do
No fixed build is published yet. The vendor describes a workaround.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.5% chance of exploitation activity in the next 30 days, which ranks it in the 38th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
11 events over 10 days, from the signal feeds we watch.
- Workaround availablerecord updated
- Workaround availablerecord updated
- Workaround availableworkaround available, published, weakness classified, record updated, record updated, record updated
Affected products
- Red Hat Advanced Cluster Management for Kubernetes 2.13Cloud & SaaS / container-orchestration
- Red Hat Advanced Cluster Management for Kubernetes 2.14Cloud & SaaS / container-orchestration
- Red Hat Advanced Cluster Management for Kubernetes 2.15Operating Systems / linux-distro
- Red Hat Advanced Cluster Management for Kubernetes 2.16Operating Systems / linux-distro
- Red Hat Advanced Cluster Management for Kubernetes 2.17Operating Systems / linux-distro
And 1 more affected product. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Scored 7.7 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
Sources
References in the record
- access.redhat.com/errata/RHSA-2026:67539
- access.redhat.com/errata/RHSA-2026:67540
- access.redhat.com/errata/RHSA-2026:67541
And 5 more references. See all after sign-in
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