CVE-2026-26963: Cilium

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.18.0 through 1.18.5 will incorrectly permit traffic from Pods on other nodes when Native Routing, WireGuard and Node Encryption are enabled. This issue has been fixed in version 1.18.6.

Affected products

• Cilium Cilium: from 1.18.0, before 1.18.6 (fixed in 1.18.6)

Published 2026-02-20. Last modified 2026-06-17.