In Mercurial before 4.1.3, "hg serve --stdio" allows remote authenticated users to launch the Python debugger, and consequently execute arbitrary code, by using --debugger as a repository name.
{
"severity": "HIGH",
"github_reviewed": true,
"cwe_ids": [
"CWE-732"
],
"nvd_published_at": null,
"github_reviewed_at": "2020-06-16T21:37:26Z"
}