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Vulnerabilities CVE-2026-45695

CVE-2026-45695

Critical
Open
TLP:CLEAR

Kopia: Unauthenticated RCE via SSH ProxyCommand Injection when --insecure --without-password is used

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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.

Details

CVSS Score
9.8
EPSS Score
0.35%

27.6th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
Jul 16, 2026
Last Modified
Jul 16, 2026
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