{"id":"CVE-2026-58202","revision":"ccd5e0339eea4124be7cf1e6849c3701","records":[{"revision":"ccd5e0339eea4124be7cf1e6849c3701","observedAt":"2026-10-23T21:48:20.592+00:00","statement":{"source":"cve-program","id":"CVE-2026-58202","aliases":[],"title":"OpenReception: Confirmation-email links built from the request Host enable pending-account takeover via `POST /api/auth/resend-confirmation`","description":"OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 2.0.0, the account-confirmation link in emails is built from the request Host header, with no allowlist. The unauthenticated POST /api/auth/resend-confirmation rotates a pending invitee's confirmation token and emails a link whose host comes from the request. An attacker who sends one resend-confirmation with Host: attacker.example and a pending invitee's email causes that invitee to receive a confirmation email whose only link points to the attacker. If the invitee clicks, the one-time confirmation token reaches the attacker, who then confirms the account on the real tenant domain and registers a passkey they control, taking over the account before the legitimate invitee ever uses it. All released versions through v1.1.0 are affected; no patched version exists yet. Reaching the app with a spoofed Host depends on the front proxy: the stock Caddy catch-all forwards it, while an operator who configures explicit per-tenant proxy blocks is not affected (see Details 4). The invite path builds links from the trusted tenant.domain (invite/+server.ts:204-210); the resend-confirmation path builds them from the request Host. This issue has been patched in version 2.0.0.","state":0,"publishedAt":"2026-10-23T20:27:36.09+00:00","modifiedAt":"2026-10-23T20:27:36.09+00:00","affected":[{"ecosystem":"Vendor product","name":"appointment-booking-software","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"open-reception\",\n                    \"product\": \"appointment-booking-software\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.0.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L","score":8.3,"severity":"HIGH"}],"references":["https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-w5g9-g2p4-2g4m","https://github.com/open-reception/appointment-booking-software/commit/df5432776a1a5b47c3a64d64e9d05dbe2b7a7819","https://github.com/open-reception/appointment-booking-software/releases/tag/v2.0.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-58202","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-58202","identifiers":["CVE-2026-58202"]},"retained":false,"historicalAffected":[]}],"coverage":[]}