Key Findings Critical unauthenticated remote code execution flaw in Kopia backup server HTTP implementation tracked as CVE-2026-45695 with CVSS score of 9.8 Vulnerability stems from improper command argument parsing in SSH backend handling without input validation or quote handling Attack exploits SSH ProxyCommand injection via the /api/v1/repo/exists endpoint when server runs with --without-password flag Requires only single HTTP request with no user interaction to achieve f
