{"id":"CVE-2026-54551","summary":"WireGuard Portal: Authenticated WebSocket /api/v0/ws broadcasts all peers' and interfaces' traffic stats to every user (missing per-user authorization)","details":"WireGuard Portal, or wg-portal, is a web-based configuration portal for WireGuard server management. From 2.2.0 until 2.3.0, the authenticated GET /api/v0/ws statistics WebSocket in internal/app/api/v0/handlers/endpoint_websocket.go subscribes to TopicPeerStatsUpdated and TopicInterfaceStatsUpdated and forwards every TrafficDelta event without per-user authorization in handleWebsocket(). A low-privilege user can enumerate peer public keys through EntityId and monitor BytesReceived and BytesTransmitted values for peers belonging to other users. The same connection exposes interface_stats and interface names that the REST API limits to administrators. Tunnel content, AllowedIPs, and user identities remain authorization-gated. This issue is fixed in version 2.3.0.","aliases":["GHSA-r45j-3jxf-wgfr"],"modified":"2026-09-19T03:45:48.562428424Z","published":"2026-09-17T17:10:53.435Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-285"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54551.json"},"references":[{"type":"WEB","url":"https://github.com/h44z/wg-portal/releases/tag/v2.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54551.json"},{"type":"ADVISORY","url":"https://github.com/h44z/wg-portal/security/advisories/GHSA-r45j-3jxf-wgfr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54551"},{"type":"FIX","url":"https://github.com/h44z/wg-portal/commit/316f389f11f3129f8603fcf3014fa7f19d7b3273"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/h44z/wg-portal","events":[{"introduced":"b553375c435a41d807541c209d5489db6d16c070"},{"fixed":"316f389f11f3129f8603fcf3014fa7f19d7b3273"},{"fixed":"9dc87dda4f4595952d3bbaf685a8075eb1df68f9"}],"database_specific":{"extracted_events":[{"introduced":"2.2.0"},{"fixed":"2.3.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v2.2.3","v2.2.2","v2.2.1","v2.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54551.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}