CVE-2026-50569
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk12th percentile — higher than 12% of all known CVEs
Summary
Fission is a serverless framework, native to Kubernetes, that prior to version 1.25.0 improperly validated the RelativeURL and Prefix fields in HTTPTriggerSpec.Validate(). These fields were only validated at the CLI level, allowing URL checks to be bypassed using kubectl or direct Kubernetes REST API calls.
Risk Assessment
Organizations may be exposed to attacks that exploit improper URL validation, potentially leading to unauthorized access to functions and applications running on Kubernetes.
Recommendation
It is recommended to upgrade to version 1.25.0 or later to ensure proper validation of all fields in HTTPTriggerSpec.
Original NVD description (English source)
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, HTTPTriggerSpec.Validate() validated Methods, FunctionReference, Host, IngressConfig, and CorsConfig, but silently skipped RelativeURL and Prefix. Those two fields were validated at the CLI level only (pkg/fission-cli/cmd/httptrigger/create.go:83). The post-CRD-modernization webhook for HTTPTrigger was retired in favor of API-server CEL — and CEL had no rules on those fields either — so an HTTPTrigger created via kubectl apply or a direct Kubernetes REST API call bypassed every URL-level check. This issue has been patched in version 1.25.0.