{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.25.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c3748d7585209781b2d3a39ac9941b91d11d9b77"
            },
            {
              "fixed": "3bab7513cbaf10b223ad92665df953196310ac97"
            }
          ],
          "repo": "https://github.com/warp-tech/warpgate",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-862h-v6cc-9757"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-116",
      "CWE-290"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63329.json"
  },
  "details": "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.",
  "id": "CVE-2026-63329",
  "modified": "2026-09-23T03:30:48.449647819Z",
  "published": "2026-09-21T18:49:01.603Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/warp-tech/warpgate/releases/tag/v0.25.6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63329.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/warp-tech/warpgate/security/advisories/GHSA-862h-v6cc-9757"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63329"
    },
    {
      "type": "FIX",
      "url": "https://github.com/warp-tech/warpgate/commit/c3748d7585209781b2d3a39ac9941b91d11d9b77"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Warpgate: x-warpgate-username Header Not Stripped from Client Requests Enables Identity Spoofing to WebSocket Backend Targets"
}