CVE-2025-30162: 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.
Classification
CVE ID: CVE-2025-30162
CVSS Base Severity: LOW
CVSS Base Score: 3.2
CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Problem Types
CWE-863: Incorrect AuthorizationAffected Products
Vendor: cilium
Product: cilium
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.02% (probability of being exploited)
EPSS Percentile: 3.22% (scored less or equal to compared to others)
EPSS Date: 2025-04-18 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-30162https://github.com/cilium/cilium/security/advisories/GHSA-24qp-4xx8-3jvj
https://github.com/cilium/proxy/pull/1172
https://docs.cilium.io/en/stable/network/lb-ipam