CVE-2026-89060
Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references
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.
INFO
Published Date :
Sept. 11, 2026, 5:16 a.m.
Last Modified :
Sept. 21, 2026, 12:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-89060
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Ensure identities only reference allowed resources.
- Apply namespace restrictions to identity configurations.
- Review resource access controls.
- Update the addon to the latest version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-89060.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-89060 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-89060
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-89060 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-89060 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Sep. 21, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89060.json">CVE-2026-89060</a> Added Reference https://access.redhat.com/errata/RHSA-2026:67539 Added Reference https://access.redhat.com/errata/RHSA-2026:67540 Added Reference https://access.redhat.com/errata/RHSA-2026:67541 Added Reference https://access.redhat.com/errata/RHSA-2026:67542 Added Reference https://access.redhat.com/errata/RHSA-2026:67543 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 11, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-89060', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-11T16:31:51.529684Z'} -
CVE Modified by [email protected]
Sep. 11, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89060.json">CVE-2026-89060</a> -
CVE Modified by [email protected]
Sep. 11, 2026
Action Type Old Value New Value Changed Description A cross-namespace authorization flaw in multicluster-observability-addon affects log-forwarding and tracing configurations that use ClusterLogForwarder or OpenTelemetryCollector resources. An authorized user who can modify ManagedClusterAddOn configuration could reference resources in another hub namespace, potentially disclosing associated Secrets to an attacker-controlled managed cluster. 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. -
CVE Modified by [email protected]
Sep. 11, 2026
Action Type Old Value New Value Changed Description A flaw was found in multicluster-observability-addon. This vulnerability allows a managed-cluster identity to reference configuration resources outside its designated namespace. This can lead to the disclosure of sensitive hub Secrets to an attacker-controlled managed cluster. A cross-namespace authorization flaw in multicluster-observability-addon affects log-forwarding and tracing configurations that use ClusterLogForwarder or OpenTelemetryCollector resources. An authorized user who can modify ManagedClusterAddOn configuration could reference resources in another hub namespace, potentially disclosing associated Secrets to an attacker-controlled managed cluster. -
New CVE Received by [email protected]
Sep. 11, 2026
Action Type Old Value New Value Added Description A flaw was found in multicluster-observability-addon. This vulnerability allows a managed-cluster identity to reference configuration resources outside its designated namespace. This can lead to the disclosure of sensitive hub Secrets to an attacker-controlled managed cluster. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Added CWE CWE-551 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89060.json">CVE-2026-89060</a> Added Reference https://access.redhat.com/security/cve/CVE-2026-89060 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2531596 Added Reference https://github.com/stolostron/multicluster-observability-addon/pull/644