CVE-2019-1349

An improper input validation flaw was discovered in git in the way it handles git submodules. A remote attacker could abuse this flaw to trick a victim user into recursively cloning a malicious repository, which, under certain circumstances, could fool git into using the same git directory twice and potentially cause remote code execution.

Mitigation

Avoid running git clone --recurse-submodules and git submodule update with untrusted repositories.