GHSA-4H5R-5JM8-JXJM gemini-mcp-tool vulnerable to OS command injection and @file exfiltration via prompt quoting (CVE-2026-0755)

Untrusted prompt input could reach the Gemini CLI @file parser, allowing read/exfiltration of arbitrary local files @/etc/passwd, @/.ssh/idrsa, @../../secret. On Windows, unquoted cmd.exe metacharacters could break out into OS command injection. Fix 1.1.6: removed the broken shell:false...