CVE-2026-45695 — Kopia: Unauthenticated RCE via SSH ProxyCommand Injection when --insecure --without-password is used
Kopia is a cross-platform backup tool for Windows, macOS, and Linux with fast incremental backups, client-side end-to-end encryption, compression, and data deduplication. Prior …
Published: 2026-07-16 · CVSS: 9.8 · CVSS 3.1
Kopia is a cross-platform backup tool for Windows, macOS, and Linux with fast incremental backups, client-side end-to-end encryption, compression, and data deduplication. Prior to 0.23.0, Kopia's HTTP server started with --without-password accepts unauthenticated requests to /api/v1/repo/exists and forwards attacker-supplied SFTP storage configuration to blob.NewStorage, where externalSSH: true and sshArguments containing -oProxyCommand=<cmd> can cause exec.CommandContext("ssh") to invoke the command through OpenSSH. This issue is fixed in version 0.23.0.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7