Flannel
Monthly
Command injection in Flannel's experimental Extension backend allows authenticated Kubernetes users with node annotation privileges to execute arbitrary commands as root on all flannel nodes in the cluster. This affects Flannel versions prior to 0.28.2 using the Extension backend; other backends (vxlan, wireguard) are unaffected. No public exploit identified at time of analysis, but CVSS 7.5 reflects high impact once node annotation access is achieved. EPSS data not available for this recent CVE (2026 designation appears to be error; actual 2025 advisory).
Command injection in Flannel's experimental Extension backend allows authenticated Kubernetes users with node annotation privileges to execute arbitrary commands as root on all flannel nodes in the cluster. This affects Flannel versions prior to 0.28.2 using the Extension backend; other backends (vxlan, wireguard) are unaffected. No public exploit identified at time of analysis, but CVSS 7.5 reflects high impact once node annotation access is achieved. EPSS data not available for this recent CVE (2026 designation appears to be error; actual 2025 advisory).