CVE-2026-66795

Description

A flaw was found in the managedcluster-import-controller. The Certificate Signing Request (CSR) auto-approval logic improperly validates incoming CSRs, specifically by not inspecting the signer name or decoding the PEM-encoded x509 CSR. This vulnerability allows a privileged service account on a spoke cluster to submit a malicious CSR. Successful exploitation can lead to privilege escalation, enabling the attacker to obtain administrative credentials on the hub cluster.

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Produits concernés

• Red Hat multicluster engine for Kubernetes 2.10
• Red Hat multicluster engine for Kubernetes 2.11
• Red Hat multicluster engine for Kubernetes 2.17
• Red Hat multicluster engine for Kubernetes 2.6
• Red Hat multicluster engine for Kubernetes 2.8
• Red Hat multicluster engine for Kubernetes 2.9

Scores CVSS

Faiblesses (CWE)

• CWE-295

Références

• https://access.redhat.com/errata/RHSA-2026:59556
• https://access.redhat.com/errata/RHSA-2026:59557
• https://access.redhat.com/errata/RHSA-2026:59558
• https://access.redhat.com/errata/RHSA-2026:59559
• https://access.redhat.com/errata/RHSA-2026:59579
• https://access.redhat.com/errata/RHSA-2026:59593
• https://access.redhat.com/security/cve/CVE-2026-66795
• https://bugzilla.redhat.com/show_bug.cgi?id=2507540

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories