CVE-2026-46614 Fission router exposes /fission-function/<ns>/<name> on its public listener, allowing invocation of any function without an HTTPTrigger

Fission is an open-source, Kubernetes-native serverless framework that simplifies the deployment of functions and applications on Kubernetes. Prior to version 1.23.0, the Fission router registers an internal-style route — /fission-function/ and /fission-function// — for every Function object,...

Improper Access Control

Fission is vulnerable to improper access control. The vulnerability is due to the router automatically registering internal function routes without validating associated HTTPTrigger restrictions, which allows an attacker to invoke arbitrary functions directly by guessing the function name and...