---
id: CVE-2026-63329
title: 'Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux'
summary: >-
  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
  t…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-116
  - CWE-290
vendor: warp-tech
product: warpgate
affected:
  - warpgate < 0.25.6
published: '2026-09-21'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:25:27.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63329'
references:
  - url: >-
      https://github.com/warp-tech/warpgate/commit/c3748d7585209781b2d3a39ac9941b91d11d9b77
    label: security-advisories@github.com
  - url: 'https://github.com/warp-tech/warpgate/releases/tag/v0.25.6'
    label: security-advisories@github.com
  - url: >-
      https://github.com/warp-tech/warpgate/security/advisories/GHSA-862h-v6cc-9757
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00308
epssPercentile: 0.21072
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-22T14:12:31.220504Z'
ingestedAt: '2026-09-21T19:51:58.861Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.