---
gem: rack-cors
cve: 2019-18978
ghsa: pf8f-w267-mq2h
url: https://github.com/cyu/rack-cors/commit/e4d4fc362a4315808927011cbe5afcfe5486f17d
date: 2019-11-15
title: rack-cors directory traversal via path
description: |
  An issue was discovered in the rack-cors (aka Rack CORS Middleware) gem
  before 1.0.4 for Ruby. It allows ../ directory traversal to access private resources
  because resource matching does not ensure that pathnames are in a canonical format.
patched_versions:
- ">= 1.0.4"