CVE-2026-19130: Provider-credential-controller: provider-credential-controller: cross-namespace credential propagation via attacker-controlled copiedfrom labels bypasses authorization

Severity: medium (CVSS 5.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-12 · updated 2026-10-23
Weakness: CWE-639

Description

A flaw was found in the provider-credential-controller component of multicluster-engine (MCE). An attacker with specific permissions on the hub cluster, and knowledge of a prior credential value, could exploit an authorization bypass vulnerability. By manipulating `copiedFrom` labels, the attacker could intercept newly rotated provider credentials, leading to unauthorized information disclosure. This allows access to sensitive credentials that should otherwise be protected.

Affected products

Red Hat multicluster engine for Kubernetes 2.10: all versions — fixed in 1787176886
Red Hat multicluster engine for Kubernetes 2.11: all versions — fixed in 1787239595
Red Hat multicluster engine for Kubernetes 2.17: all versions — fixed in 1786664288
Red Hat multicluster engine for Kubernetes 2.6: all versions — fixed in 1787260821
Red Hat multicluster engine for Kubernetes 2.8: all versions — fixed in 1787259099
Red Hat multicluster engine for Kubernetes 2.9: all versions — fixed in 1787176716

How to fix

Upgrade to a fixed version: Red Hat multicluster engine for Kubernetes 2.10 1787176886; Red Hat multicluster engine for Kubernetes 2.11 1787239595; Red Hat multicluster engine for Kubernetes 2.17 1786664288; Red Hat multicluster engine for Kubernetes 2.6 1787260821; Red Hat multicluster engine for Kubernetes 2.8 1787259099; Red Hat multicluster engine for Kubernetes 2.9 1787176716. Check the vendor advisory for mitigations.

References

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