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CVE-2026-89060— Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references

Quick assessment

Affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 multicluster-observability-addon 中发现了缺陷。该漏洞允许托管集群的身份引用其指定命名空间之外的配置资源。这可能导致敏感的中心集群（Hub）密钥（Secrets）泄露给攻击者控制的托管集群。

CVSS 7.7 · High
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I. Basic Information for CVE-2026-89060

Vulnerability Information
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Vulnerability Title
Stolostron/multicluster-observability-addon: cross-namespace secret disclosure in multicluster-observability-addon via unvalidated configuration references
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的行为次序：在解析与净化处理之前进行授权
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2

II. Public POCs for CVE-2026-89060

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III. Intelligence Information for CVE-2026-89060

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Patches & Fixes for CVE-2026-89060 (1)

Vendor Advisories for CVE-2026-89060 (1)

Other References for CVE-2026-89060 (1)

IV. Related Vulnerabilities

Same vendor: Red Hat
Same weakness: CWE-551

V. Comments for CVE-2026-89060

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