CVE-2026-26963
February 19, 2026
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 Packages
https://github.com/cilium/cilium.git (GITHUB):
Affected version(s) >=v0.8.0 <v1.18.6Fix Suggestion:
Update to version v1.18.6https://github.com/cilium/cilium.git (GITHUB):
Affected version(s) >=v1.19.0-pre.0 <v1.19.0Fix Suggestion:
Update to version v1.19.0github.com/cilium/cilium (GO):
Affected version(s) >=v1.18.0 <v1.18.6Fix Suggestion:
Update to version v1.18.6Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
ADJACENT
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.01
