Nixpkgs security tracker

Untriaged

Permalink CVE-2026-26963

6.1 MEDIUM

CVSS version: 3.1
Attack vector (AV): ADJACENT_NETWORK
Attack complexity (AC): LOW
Privileges required (PR): NONE
User interaction (UI): NONE
Scope (S): CHANGED
Confidentiality impact (C): LOW
Integrity impact (I): LOW
Availability impact (A): NONE

created 1 month, 4 weeks ago

Cilium may not enforce host firewall policies when Native Routing, WireGuard and Node Encryption are enabled

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.

References

https://github.com/cilium/cilium/security/advisories/GHSA-5r23-prx4-mqg3 x_refsource_CONFIRM
https://github.com/cilium/cilium/pull/42892 x_refsource_MISC
https://github.com/cilium/cilium/commit/88e28e1e62c0b1a02c3f0fc22d888ac9eefbe885 x_refsource_MISC
https://github.com/cilium/cilium/releases/tag/v1.18.6 x_refsource_MISC

Affected products

cilium

==>= 1.18.0, < 1.18.6

Matching in nixpkgs

pkgs.cilium-cli

CLI to install, manage & troubleshoot Kubernetes clusters running Cilium

nixos-unstable 0.19.0
- nixpkgs-unstable 0.19.0
- nixos-unstable-small 0.19.0
nixos-25.11 0.18.8
- nixos-25.11-small 0.18.8
- nixpkgs-25.11-darwin 0.18.8

Package maintainers

@akshatagarwl Akshat Agarwal <humancalico@disroot.org>
@qjoly Quentin JOLY <github@une-pause-cafe.fr>
@bryanasdev000 Bryan Albuquerque <bryanasdev000@gmail.com>
@ryan4yin Ryan Yin <xiaoyin_c@qq.com>

Suggestion detail

References

Affected products

Matching in nixpkgs

pkgs.cilium-cli

Package maintainers