Warp-Tech Warpgate up to 0.25.5 Proxy proxy.rs copy_server_request x-warpgate-username improper authorization

Summaryinfo

A vulnerability categorized as critical has been discovered in Warp-Tech Warpgate up to 0.25.5. Affected is the function copy_server_request of the file warpgate-protocol-http/src/proxy.rs of the component Proxy. Executing a manipulation of the argument x-warpgate-username can lead to improper authorization. This vulnerability is registered as CVE-2026-63329. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Warp-Tech Warpgate up to 0.25.5. It has been declared as critical. This vulnerability affects the function copy_server_request of the file warpgate-protocol-http/src/proxy.rs of the component Proxy. The manipulation of the argument x-warpgate-username with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. Prior to 0.25.6, copy_server_request in warpgate-protocol-http/src/proxy.rs forwards a client-supplied x-warpgate-username header before inject_own_headers appends the authenticated username. Because the request builder preserves repeated values, a proxied backend that trusts the first x-warpgate-username value can authorize an authenticated attacker as another user. The same forwarding policy also accepts the reserved x-warpgate-authentication-type header, and warpgate-common/src/http_headers.rs does not exclude either reserved identity header. This issue is fixed in version 0.25.6.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-63329 since 07/16/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 0.25.6 eliminates this vulnerability.

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Productinfo

Vendor

• Warp-Tech

Name

• Warpgate

Version

• 0.25.0
• 0.25.1
• 0.25.2
• 0.25.3
• 0.25.4
• 0.25.5

Website

• Product: https://github.com/warp-tech/warpgate/

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