CVE-2026-73137 Red Hat CVE debrief

Who should care

Organizations using Red Hat Advanced Cluster Management (RHACM) should be aware of this vulnerability and assess their exposure. Specifically, those with tenants that have HelmRelease create permissions should take steps to mitigate potential credential exfiltration.

Technical summary

The multicloud-operators-subscription component of Red Hat Advanced Cluster Management (RHACM) is vulnerable to a flaw that allows tenants with HelmRelease create permissions to manipulate the `secretRef.Namespace` field. This manipulation can lead to the `GetSecret()` function in the HelmRelease controller fetching sensitive credentials from any namespace. These credentials are then sent to an attacker-controlled Helm repository, potentially resulting in credential exfiltration from arbitrary namespace Secrets.

Defensive priority

Organizations using Red Hat Advanced Cluster Management (RHACM) should assess their exposure and take steps to mitigate potential credential exfiltration.

Recommended defensive actions

• Review and restrict HelmRelease create permissions in RHACM
• Monitor for suspicious activity related to credential exfiltration
• Implement compensating controls to protect sensitive credentials
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE-2026-73137 record indicates a flaw in the multicloud-operators-subscription component of Red Hat Advanced Cluster Management (RHACM). A tenant with HelmRelease create permissions can manipulate the `secretRef.Namespace` field to fetch sensitive credentials from any namespace. These credentials are then sent to an attacker-controlled Helm repository, leading to potential credential exfiltration from arbitrary namespace Secrets. The CVSS score is 7.7, indicating a high severity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.