{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-48075",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-20T18:25:25.708Z",
        "datePublished": "2026-08-06T20:39:34.056Z",
        "dateUpdated": "2026-08-07T17:15:21.502Z"
    },
    "containers": {
        "cna": {
            "title": "OpenReception's unauthenticated add-to-tunnel endpoint accepts arbitrary appointment injections",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-862",
                            "lang": "en",
                            "description": "CWE-862: Missing Authorization",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-rhp5-vmcx-4qm8",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-rhp5-vmcx-4qm8"
                },
                {
                    "name": "https://github.com/open-reception/appointment-booking-software/commit/4522a44c001782848faff5529d7c1e2be7ac9ef5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/open-reception/appointment-booking-software/commit/4522a44c001782848faff5529d7c1e2be7ac9ef5"
                }
            ],
            "affected": [
                {
                    "vendor": "open-reception",
                    "product": "appointment-booking-software",
                    "versions": [
                        {
                            "version": "< 1.0.5",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-06T20:39:34.056Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.5, the `add-to-tunnel` endpoint creates a new appointment row in any client tunnel without any caller authentication. A request that supplies any valid `tunnelId` and any valid `emailHash` (the two need not belong to the same tunnel) results in an inserted appointment with `status = \"CONFIRMED\"`, attacker-controlled ciphertext fields, attacker-controlled date and duration, and an attacker-chosen agent. The endpoint validates only that some tunnel exists with the given `emailHash`, then writes the appointment using the attacker-supplied `tunnelId` directly. The `emailHash` lookup is effectively an existence check on the tenant; it does not authenticate the caller as the owner of the supplied `tunnelId`. Combined with the absence of any session, Authorization header, booking access token, or PoW, this makes the endpoint accept arbitrary appointment writes into arbitrary tunnels. By contrast, the sibling endpoint `create-new-client` (used to bootstrap a brand-new client tunnel) requires a Bearer bootstrap booking access token issued by the bootstrap-challenge / bootstrap-verify flow. The `add-to-tunnel` endpoint, intended for return-clients booking additional appointments, has no equivalent gate. The application's own middleware confirms this is intentional: `add-to-tunnel` is explicitly listed in the apiAuthHandle public-route allowlist alongside the bootstrap and challenge endpoints (which legitimately have no session). Version 1.0.5 fixes the issue."
                }
            ],
            "source": {
                "advisory": "GHSA-rhp5-vmcx-4qm8",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-rhp5-vmcx-4qm8",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-07T17:14:46.685036Z",
                                "id": "CVE-2026-48075",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-07T17:15:21.502Z"
                }
            }
        ]
    }
}