Critical [CVE-2026-71471] Hub Search CR Collector.ImageOverride propagated to every spoke as arbitrary container image
This critical-severity Red Hat Linux advisory covers CVE-2026-71471 affecting Red Hat Advanced Cluster Management for Kubernetes 2.
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Summary
A flaw was found in acm-search-v2-rhel9. An attacker with administrative privileges on the hub cluster, specifically with patch access to the Search Custom Resource (CR), could exploit a vulnerability in the `Collector.
ImageOverride` field. This allows the attacker to deploy an arbitrary container image across all managed clusters.
The consequence is remote code execution (RCE), enabling the attacker to execute commands and potentially access sensitive information across the entire fleet of managed clusters. This is an Important vulnerability in Red Hat Advanced Cluster Management for Kubernetes.
This is due to the propagation of the `Collector. Red Hat severity: Important — CVSS 9 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L).
Weakness: CWE-829. Red Hat does not currently list a fixing RHSA for this CVE.
Affected product named by the advisory: Red Hat Advanced Cluster Management for Kubernetes 2.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- To mitigate this issue, restrict patch access to the Search Custom Resource (CR) to only trusted and authorized hub administrators. This limits the ability of unauthorized principals to modify the `Collector.ImageOverride` field and deploy arbitrary container images across the managed fleet.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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