CVE-2026-73834: Must-gather: must-gather: embedded secret data in acm wrapper crs collected without redaction

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-18 · updated 2026-09-05
Weakness: CWE-312

Description

A flaw was found in the must-gather component of Red Hat Advanced Cluster Management for Kubernetes. Certain ACM wrapper Custom Resources that embed Secret data are collected without redaction. When an administrator runs must-gather, credentials and tokens are captured in cleartext in the resulting archive, potentially exposing sensitive information to anyone with access to the archive.

Affected products

Red Hat Advanced Cluster Management for Kubernetes 2.11: all versions — fixed in 1787263322
Red Hat Advanced Cluster Management for Kubernetes 2.13: all versions — fixed in 1787260453
Red Hat Advanced Cluster Management for Kubernetes 2.14: all versions — fixed in 1787189811
Red Hat Advanced Cluster Management for Kubernetes 2.15: all versions — fixed in 1787238730
Red Hat Advanced Cluster Management for Kubernetes 2.16: all versions — fixed in 1787234748
Red Hat Advanced Cluster Management for Kubernetes 2.17: all versions — fixed in 1787228698

How to fix

Upgrade to a fixed version: Red Hat Advanced Cluster Management for Kubernetes 2.11 1787263322; Red Hat Advanced Cluster Management for Kubernetes 2.13 1787260453; Red Hat Advanced Cluster Management for Kubernetes 2.14 1787189811; Red Hat Advanced Cluster Management for Kubernetes 2.15 1787238730; Red Hat Advanced Cluster Management for Kubernetes 2.16 1787234748; Red Hat Advanced Cluster Management for Kubernetes 2.17 1787228698. Check the vendor advisory for mitigations.

References

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