{"id":"CVE-2026-63329","summary":"Warpgate: x-warpgate-username Header Not Stripped from Client Requests Enables Identity Spoofing to WebSocket Backend Targets","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.","aliases":["GHSA-862h-v6cc-9757"],"modified":"2026-09-23T03:45:26.327282414Z","published":"2026-09-21T18:49:01.603Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/warp-tech/warpgate","events":[{"introduced":"0"},{"fixed":"c3748d7585209781b2d3a39ac9941b91d11d9b77"},{"fixed":"3bab7513cbaf10b223ad92665df953196310ac97"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"0.25.6"}]}}],"versions":["v0.25.5","v0.25.4","v0.25.3","v0.25.2","v0.25.1","v0.25.0","v0.24.0","chart-v0.0.5","v0.23.4","v0.23.3","v0.23.2","v0.23.1","v0.23.0","chart-v0.0.4","0.22.0-dl","v0.22.0-beta.6","v0.22.0-beta.5","v0.22.0-beta.4","v0.22.0-beta.3","chart-v0.0.3","chart-v0.0.2","v0.22.0-beta.2","v0.22.0-beta.1","v0.21.1","v0.21.0","v0.20.2","v0.20.1","v0.20.0","v0.19.1","v0.19.0","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.15.0-beta.2","v0.15.0-beta.1","v0.14.1","v0.14.0","v0.14.0-beta.3","v0.14.0-beta.2","v0.14.0-beta.1","v0.13.2","v0.13.1","v0.13.0","v0.13.0-beta.2","v0.13.0-beta.1","v0.12.0","v0.12.0-beta.2","v0.12.0-beta.1","v0.11.0","v0.10.2","v0.10.1","v0.10.0","v0.9.1","v0.9.0","v0.8.1","v0.8.0","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.6","v0.6.5","v0.6.4","v0.6.3","v0.6.2","v0.6.1","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.2.2","v0.2.1","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63329.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N"}]}