CVE-2026-66785 — Submariner: submariner: missing validation of remote endpoint subnets and clusterid enables cross-cluster traffic hijack
A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a s…
Published: 2026-08-20 · CVSS: 8.7 · CVSS 3.1
A flaw was found in Submariner. This vulnerability allows a malicious cluster (spoke) to redirect network traffic from other connected clusters (peer clusters) by publishing a specially crafted network endpoint. The system fails to properly validate the network subnets provided by the malicious cluster, enabling it to declare arbitrary network ranges. Consequently, all network traffic intended for these arbitrary ranges from peer clusters will be rerouted through the attacker's tunnel, potentially leading to unauthorized information disclosure or network disruption.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7