Description
A flaw was found in submariner. In cert-auth mode, the connection configuration is built using free-form strings from the Custom Resource Definition (CRD) without proper validation. A malicious cluster can exploit this by publishing a CableName that includes newlines and ipsec.conf directives. This allows an attacker to inject arbitrary configuration parameters or execute commands through leftupdown hooks, leading to remote code execution as root on the gateway node.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.16 | — | — |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2.17 | — | — |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 | — | — |
References
- RHSA-2026:63016 vendor-advisory
- RHSA-2026:85227 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-66786 vdb-entry
- RHBZ#2507531 issue-tracking