Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/warp-tech/warpgate/commit/c3748d7585209781b2d3a39ac9941b91d11
- https://github.com/warp-tech/warpgate/releases/tag/v0.25.6
- https://github.com/warp-tech/warpgate/security/advisories/GHSA-862h-v6cc-9757
FAQ
What is CVE-2026-63329?
CVE-2026-63329 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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 heade...
How severe is CVE-2026-63329?
CVE-2026-63329 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-63329?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.