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Vulnerabilities

CVE-2026-45695 | BDVDB-2026-348941 Detail

kopiakopia

Description#

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

  • CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  • CWE-306 Missing Authentication for Critical Function

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.