CVE-2026-67322 GitPython before 3.1.52 Environment Variable Exfiltration via clone_from

GitPython before 3.1.52 is vulnerable to environment-variable exfiltration in Repo.clonefrom. The caller-supplied remote URL is passed through Git.polishurl, which on non-Cygwin platforms calls os.path.expandvars on the URL before invoking git clone. An attacker who controls the clone URL can emb...