Cilium is a networking, observability, and security solution with an eBPF-based dataplane.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Feb 20, 2026 · NIST NVD

   Detected

   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.

2. Jun 17, 2026 · NIST NVD

   Updated

   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

• cpe cilium/ciliumversion unspecified

Sources

• NIST NVDVulnerability recordCVE-2026-26963

  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

  nvd.nist.gov

References

• Patch · github.com
• Issue Tracking · github.com
• Release Notes · github.com
• Patch · github.com