CVE-2026-32241

CVE-2026-32241 – Flannel extension backend command injection . The vulnerability affects Flannel prior to v0.28.2 when using the experimental Extension backend. The SubnetAddCommand and SubnetRemoveCommand take attacker-controlled data from the Kubernetes Node annotation flannel.alpha.coreos.com/...

CVE-2026-32241

Flannel is a network fabric for containers, designed for Kubernetes. The Flannel project includes an experimental Extension backend that allows users to easily prototype new backend types. In versions of Flannel prior to 0.28.2, this Extension backend is vulnerable to a command injection that...

CVE-2026-32241 Flannel vulnerable to cross-node remote code execution via extension backend BackendData injection

Flannel is a network fabric for containers, designed for Kubernetes. The Flannel project includes an experimental Extension backend that allows users to easily prototype new backend types. In versions of Flannel prior to 0.28.2, this Extension backend is vulnerable to a command injection that...

PT-2026-28434

Name of the Vulnerable Software and Affected Versions Flannel versions prior to 0.28.2 Description Flannel, a network fabric for containers designed for Kubernetes, contains a command injection issue in its experimental Extension backend. An attacker who can set Kubernetes Node annotations can...