MustGather in Red Hat ACM Exposes Secrets in Cleartext (CVE-2026-73834)
CVE-2026-73834 Published on August 18, 2026
Must-gather: must-gather: embedded secret data in acm wrapper crs collected without redaction
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.
Vulnerability Analysis
CVE-2026-73834 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Timeline
Reported to Red Hat.
Made public. 22 days later.
Weakness Type
Cleartext Storage of Sensitive Information
The application stores sensitive information in cleartext within a resource that might be accessible to another control sphere. Because the information is stored in cleartext, attackers could potentially read it. Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information.
Products Associated with CVE-2026-73834
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Affected Versions
Red Hat Advanced Cluster Management for Kubernetes 2.11:- Version 1787263322 and below * is unaffected.
- Version 1787260453 and below * is unaffected.
- Version 1787189811 and below * is unaffected.
- Version 1787238730 and below * is unaffected.
- Version 1787234748 and below * is unaffected.
- Version 1787228698 and below * is unaffected.