East-west traffic not subject to egress policy enforcement for requests via Gateway API load balancers
Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. For Cilium users who use Gateway API for Ingress for some services and use LB-IPAM or BGP for LB Service implementation and use network policies to block egress traffic from workloads in a namespace to workloads in other namespaces, egress traffic from workloads covered by such network policies to LoadBalancers configured by Gateway resources will incorrectly be allowed. LoadBalancer resources not deployed via a Gateway API configuration are not affected by this issue. This issue affects: Cilium v1.15 between v1.15.0 and v1.15.14 inclusive, v1.16 between v1.16.0 and v1.16.7 inclusive, and v1.17 between v1.17.0 and v1.17.1 inclusive. This issue is fixed in Cilium v1.15.15, v1.16.8, and v1.17.2. A Clusterwide Cilium Network Policy can be used to work around this issue for users who are unable to upgrade.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/cilium/ciliumGo | >= 1.16.0, < 1.16.8 | 1.16.8 |
github.com/cilium/ciliumGo | >= 1.17.0, < 1.17.2 | 1.17.2 |
github.com/cilium/ciliumGo | >= 1.15.0, < 1.15.15 | 1.15.15 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- github.com/advisories/GHSA-24qp-4xx8-3jvjghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-30162ghsaADVISORY
- docs.cilium.io/en/stable/network/lb-ipamghsax_refsource_MISCWEB
- github.com/cilium/cilium/security/advisories/GHSA-24qp-4xx8-3jvjghsax_refsource_CONFIRMWEB
- github.com/cilium/proxy/pull/1172ghsax_refsource_MISCWEB
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