CVE-2026-26963: Cilium Wireguard Ingress Policy Bypass
Returning `CTX_ACT_OK` at the end of `handle_ipv4` or `handle_ipv6` without handling host delivery allows packets from WireGuard or similar network tunnels to bypass host ingress network policies. Ensure that host-bound packets are correctly redirected (e.g. using `ipv4_host_delivery` or `ipv6_host_delivery`) rather than being permitted by default.
Cgreprules fetch cve-2026-26963-cilium-wireguard-ingress-policy-bypass --engine opengrepDescription
Returning `CTX_ACT_OK` at the end of `handle_ipv4` or `handle_ipv6` without handling host delivery allows packets from WireGuard or similar network tunnels to bypass host ingress network policies. Ensure that host-bound packets are correctly redirected (e.g. using `ipv4_host_delivery` or `ipv6_host_delivery`) rather than being permitted by default.
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