In Mercurial before 4.4.1, it is possible that a specially malformed repository can cause Git subrepositories to run arbitrary code in the form of a .git/hooks/post-update
script checked into the repository. Typical use of Mercurial prevents construction of such repositories, but they can be created programmatically.
{ "nvd_published_at": "2017-12-07T18:29:00Z", "cwe_ids": [ "CWE-78" ], "severity": "CRITICAL", "github_reviewed": true, "github_reviewed_at": "2024-05-01T17:02:42Z" }