CVE-2021-25745: Improper Input Validation in k8s.io/ingress-nginx

The provided vulnerability information describes an improper input validation issue in the spec.rules[].http.paths[].path field handling, but does not include specific code references, commit diffs, or patch details that would allow identification of exact vulnerable functions. While the vulnerability clearly exists in the path validation logic of the ingress-nginx controller's Ingress resource processing, the technical reports and advisories provided do not contain sufficient implementation details (function names, file paths, or specific validation logic) to confidently identify specific functions. The mitigation suggests adding path validation rules, but without seeing the actual code changes or maintainer comments linking to specific functions, we cannot reliably map the vulnerability to concrete function implementations.