CVE-2026-45695

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 v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

16 Jul 2026, 16:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-16 16:19

Updated : 2026-07-16 19:16

NVD link : CVE-2026-45695

Mitre link : CVE-2026-45695

CVE.ORG link : CVE-2026-45695

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-306

Missing Authentication for Critical Function

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