{"schema":"threatline.record/2","record":{"id":"CVE-2026-58202","aliases":["GHSA-w5g9-g2p4-2g4m"],"summary":"OpenReception: Confirmation-email links built from the request Host enable pending-account takeover via `POST /api/auth/resend-confirmation`","details":"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.","categories":["Unclassified"],"product":"appointment-booking-software","vendor":"open-reception","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-58202","source_modified_at":"2026-10-23T20:27:36.090Z","fetched_at":"2026-10-23T20:37:03.234832Z","product":"appointment-booking-software","vendor":"open-reception","versions":[{"status":"affected","version":"< 2.0.0"}],"defaultStatus":null}],"fixed_versions":[],"cvss":8.3,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00429,"percentile":0.36156,"score_date":"2026-10-24"},"published_at":"2026-10-23T20:27:36.090Z","modified_at":"2026-10-23T20:27:36.090Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-58202","fetched_at":"2026-10-23T20:37:03.234832Z","source_modified_at":"2026-10-23T20:27:36.090Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-58202","fetched_at":"2026-10-24T18:03:20.872036Z","source_modified_at":"2026-10-24"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-w5g9-g2p4-2g4m","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/open-reception/appointment-booking-software/commit/df5432776a1a5b47c3a64d64e9d05dbe2b7a7819","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/open-reception/appointment-booking-software/releases/tag/v2.0.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T20:27:36.090Z","content_hash":"06db2229934b51ec558fd8fdbfe7e8474a6495b89e47daba4e1cd1e1de5c3282"}}