Critical SEVERITY — Vulnerability

CVE-2026-45695 — Kopia is a cross-platform backup tool for Windows, macOS, and Linux with fast incremental backups, client-side end-to-en

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("ss

Platform
Windows Server
CVE Record
CVE-2026-45695
CVSS Score
9.8/10
Published
16 July 2026
Views
3
Primary source: Review the official advisory at nvd.nist.gov Kaynağa Git

Summary

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.

Assessment

  • CVE: CVE-2026-45695
  • CVSS base score: 9.8
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Source: NVD entry

References

Actions

  • Verify affected systems against inventory
  • Apply the vendor patch during a maintenance window
  • Restrict access at the network layer until the patch is applied

Windows Server — Related Advisories

VIEW ALL →