Kopia Server 0.23.0 - Remote Code Execution

Kopia before version 0.23.0 allows unauthenticated remote code execution when started in server mode with the --without-password flag. When the /api/v1/repo/exists endpoint is exposed, it enables instantiation of the SFTP storage backend with user-supplied sshArguments. Due to improper argument...

VulnCheck KEV: 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 a...

CVE-2026-45695

A flaw was found in Kopia, a cross-platform backup tool. An unauthenticated remote attacker can exploit the HTTP server, when started without a password, by sending specially crafted requests to the /api/v1/repo/exists endpoint. This allows the attacker to forward malicious SFTP storage...

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 a...

CVE-2026-45695

The Kopia backup tool (versions prior to 0.23.0 ) is vulnerable to unauthenticated remote code execution (RCE) when the HTTP server is started with the --without-password flag. An attacker can send specially crafted requests to the /api/v1/repo/exists endpoint to inject malicious SFTP storage con...

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 a...

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 a...

CVE-2026-45695 Kopia: Unauthenticated RCE via SSH ProxyCommand Injection when --insecure --without-password is used

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 a...

CVE-2026-45695 Kopia: Unauthenticated RCE via SSH ProxyCommand Injection when --insecure --without-password is used

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 a...

CVE-2026-45695 Kopia: Unauthenticated RCE via SSH ProxyCommand Injection when --insecure --without-password is used

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 a...

CVE-2026-45695: Improper Neutralization of Special Elements used in an OS Command

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 a...

GO-2026-5009 Kopia: RCE via SSH ProxyCommand Injection in github.com/kopia/kopia

Kopia: RCE via SSH ProxyCommand Injection in github.com/kopia/kopia...

Arbitrary Command Injection

Overview Affected versions of this package are vulnerable to Arbitrary Command Injection via the ProxyCommand process. An attacker can execute arbitrary commands on the system by injecting malicious input into the SSH ProxyCommand configuration. Remediation Upgrade...

Arbitrary Command Injection

Overview Affected versions of this package are vulnerable to Arbitrary Command Injection via the ProxyCommand process. An attacker can execute arbitrary commands on the system by injecting malicious input into the SSH ProxyCommand configuration. Remediation Upgrade github.com/kopia/kopia/cli to...

PT-2026-42385

Kopia: RCE via SSH ProxyCommand Injection in github.com/kopia/kopia...

Kopia: RCE via SSH ProxyCommand Injection

Summary Kopia's HTTP server, when started with --without-password , accepts unauthenticated requests to /api/v1/repo/exists. The handler forwards an attacker-supplied storage configuration to blob.NewStorage. For SFTP backends with externalSSH: true, that path constructs a process command line by...

GHSA-2Q4C-3MRW-63C3 Kopia: RCE via SSH ProxyCommand Injection

Summary Kopia's HTTP server, when started with --without-password , accepts unauthenticated requests to /api/v1/repo/exists. The handler forwards an attacker-supplied storage configuration to blob.NewStorage. For SFTP backends with externalSSH: true, that path constructs a process command line by...

How to Update Location Profile Endpoint Details and Preserve Access to an Existing Kopia Storage Repository

Purpose This article documents the correct procedure to update the Endpoint details in the Location Profile for an existing Kopia storage repository in S3-compatible stores and ensure the existing associated repositories remain accessible. Customers may wish to update the Endpoint details e.g.,...

GO-2024-2703 Kopia: Storage connection credentials written to console on "repository status" CLI command with JSON output in github.com/kopia/kopia

Kopia: Storage connection credentials written to console on "repository status" CLI command with JSON output in github.com/kopia/kopia...

Sensitive Data Exposure

github.com/kopia/kopiais vulnerable to Sensitive Data Exposure. This vulnerability is due to the "repository status" CLI command with JSON output containing sensitive storage connection credentials which are inadvertently exposed to the console...