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CVE-2019-18978

CVE-2019-18978

EPSS 2.5%
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.
Affected products
n/a · n/a

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References
https://github.com/cyu/rack-cors/commit/e4d4fc362a4315808927011cbe5afcfe5486f17dhttps://github.com/cyu/rack-cors/compare/v1.0.3...v1.0.4https://lists.debian.org/debian-lts-announce/2020/02/msg00004.htmlhttps://lists.debian.org/debian-lts-announce/2020/10/msg00000.htmlhttps://usn.ubuntu.com/4571-1/https://www.debian.org/security/2021/dsa-4918