CVE-2026-89060
Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
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.
Timeline
ID reserved
By redhat
- 1 day later
· 1 day later
Published
- 10 days later
· 10 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | High7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVDNVD · Awaiting Analysis | 3.1 | High7.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.47% · top 59% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.
Weakness
Affected products
multicluster-observability-addon
- affected < *
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.13
- unaffected 1789126264 – < *
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.14
- unaffected 1789126262 – < *
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.15
- unaffected 1789126262 – < *
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.16
- unaffected 1789126267 – < *
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.17
- unaffected 1789126264 – < *
What to do
Workaround: Disable MCOA log-forwarding and tracing capabilities that use ClusterLogForwarder or OpenTelemetryCollector resources.
References (8)
- RHSA-2026:67539 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:67540 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:67541 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:67542 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:67543 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-89060 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2531596 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://github.com/stolostron/multicluster-observability-addon/pull/644 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-89060)Record last updated .