This bill, known as the Combating Foreign Threats to Main Street Act of 2026, directs the Small Business Administration to create and distribute educational materials warning small businesses about harmful activities by foreign adversaries, such as China or other designated hostile nations and their affiliated entities. The materials must cover threats like intellectual property theft, cyberattacks, forced labor in supply chains, counterfeit goods, and risky foreign investment deals, while also offering practical guidance on cybersecurity, supply chain protection, and safely operating in foreign markets. The SBA must work with agencies including the Departments of Homeland Security, State, Treasury, and Commerce, the FBI, and the U.S. Trade Representative to develop this guidance, and must make it available through SBA district offices and other programs. Starting October 1, 2027, and every year after, the SBA is required to review and update these materials to keep pace with new threats and changing laws. If the SBA identifies a new type of foreign threat not already listed in the bill, it must notify the House and Senate Small Business Committees and explain its reasoning, ensuring congressional oversight of how the program evolves.