---
title: "CVE-2026-89060: multicluster-observability-addon - Broken Access Control"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-89060/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89060)

## 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](https://cwe.mitre.org/data/definitions/551.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89060](https://nvd.nist.gov/vuln/detail/CVE-2026-89060)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2531596](https://bugzilla.redhat.com/show_bug.cgi?id=2531596)
- [https://github.com/stolostron/multicluster-observability-addon/pull/644](https://github.com/stolostron/multicluster-observability-addon/pull/644)
- [https://access.redhat.com/errata/RHSA-2026:67539](https://access.redhat.com/errata/RHSA-2026:67539)
- [https://access.redhat.com/errata/RHSA-2026:67540](https://access.redhat.com/errata/RHSA-2026:67540)
- [https://access.redhat.com/errata/RHSA-2026:67541](https://access.redhat.com/errata/RHSA-2026:67541)
- [https://access.redhat.com/errata/RHSA-2026:67542](https://access.redhat.com/errata/RHSA-2026:67542)
- [https://access.redhat.com/errata/RHSA-2026:67543](https://access.redhat.com/errata/RHSA-2026:67543)
- [https://access.redhat.com/security/cve/CVE-2026-89060](https://access.redhat.com/security/cve/CVE-2026-89060)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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