CVE-2026-50570 Fission: Incomplete capability denylist in Environment/Function PodSpec validation allows tenant-added CAP_SYS_TIME and cross-tenant node wall-clock corruption

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.25.0, Fission added PodSpec safety validation for tenant-facing Environment and Function CRDs ValidatePodSpecSafety /...

Fission builder accepts arbitrary buildcmd strings from Environment.spec.builder.command, allowing the builder pod to invoke arbitrary executables

Summary Before the round-1 security sweep, pkg/builder/builder.go passed Environment.spec.builder.command directly into exec.Command... after a strings.Fields split, with no validation of the executable path or its arguments. A user who could create or update Environment CRDs in a namespace...