CVE-2026-26963
cilium: Cilium: Information disclosure via incorrect traffic permitting with specific network configurations
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 20, 2026
Updated · June 28, 2026
Description
A flaw was found in Cilium. When specific network configurations, including Native Routing, WireGuard, and Node Encryption, are enabled, Cilium incorrectly allows network traffic from Pods on other nodes. This can lead to unauthorized access to network communications and potential information disclosure.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CWE-266 · Incorrect Privilege Assignment