CVE-2026-26963

MEDIUM

Cilium 1.18.0-1.18.5 - Incorrect Authorization via Native Routing with WireGuard and Node Encryption

Title source: llm
STIX 2.1

Description

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.

Scores

CVSS v3 6.1
EPSS 0.0001
EPSS Percentile 0.4%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (2)
cilium/cilium 1.18.0 - 1.18.6Go
cilium/cilium 1.18.0 - 1.18.6
Published Feb 20, 2026
Tracked Since Feb 20, 2026