Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/kopia/kopia/commit/c26c6a1b9734c5089217986ffa5cd19f8a6b8900
- https://github.com/kopia/kopia/pull/5354
- https://github.com/kopia/kopia/releases/tag/v0.23.0
- https://github.com/kopia/kopia/security/advisories/GHSA-2q4c-3mrw-63c3
FAQ
What is CVE-2026-45695?
CVE-2026-45695 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2026-45695?
CVE-2026-45695 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-45695?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.