Jekyll through 3.6.2, 3.7.x through 3.7.3, and 3.8.x through 3.8.3 allows attackers to access arbitrary files by specifying a symlink in the "include" key in the "_config.yml" file.
{ "binaries": [ { "binary_name": "jekyll", "binary_version": "3.0.1+dfsg-1" } ] }
{ "binaries": [ { "binary_name": "jekyll", "binary_version": "3.1.6+dfsg-3" } ] }