CVE-2026-48086 — OpenReception's appointment booking software provides an end-to-end encrypted appointment…¶
Key facts
CVE-2026-48086 is a Critical (9.9) vulnerability: OpenReception's appointment booking software provides an end-to-end encrypted appointment…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-48086 |
| Severity | Critical (9.9) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-48086/ |
Details¶
English | 한국어
Description¶
OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.2, a TENANT_ADMIN promotes themselves to platform-wide GLOBAL_ADMIN through a single PUT request. The role-update handler accepts the GLOBAL_ADMIN enum value from any tenant admin updating their own tenant's staff. No policy check enforces that "only an existing GLOBAL_ADMIN may grant GLOBAL_ADMIN", so the schema validation IS the authorization decision. After re-login, the JWT contains the new role and the formerly-tenant-scoped admin reaches every other tenant on the platform. On the hosted OpenReception service this is a scope-changed escalation: a single customer-side tenant administrator gains full platform-wide administrative control over all other tenants' configuration, users, staff records, operational metadata, and tenant lifecycle. Plaintext appointment contents remain subject to the E2E model unless chained with the staff-crypto poisoning issue (V-4) or with staff-passkey hijacking (V-1). On a single-tenant self-hosted deployment it is still a privilege escalation because TENANT_ADMIN should not be able to create new tenants, modify global configuration, or manage other administrators. The same handler also accepts updates targeted at any colleague within the tenant. A tenant admin can promote a separate collaborator account instead of themselves, leaving their own audit trail clean while the platform-wide breach happens through a separate identity. Version 1.0.2 fixes the issue.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-48086 |
| Type | RCE |
| CVSS Score | 9.9 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-48086/poc.py
Usage¶
# Run PoC against target
python3 poc.py --target <TARGET_URL>
# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>
⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.
Test Lab¶
This repository includes a Docker-based test environment with both vulnerable and patched applications.
Quick Start¶
# Clone and navigate to CVE directory
cd CVE-2026-48086
# Start both applications
docker-compose up -d
# Run tests
./run-tests.sh # Linux/Mac
./run-tests.ps1 # Windows PowerShell
Application Endpoints¶
| Application | URL | Status |
|---|---|---|
| Vulnerable App | http://localhost:8080 | Shows vulnerability |
| Patched App | http://localhost:8081 | Demonstrates fix |
Directory Structure¶
├── README.md # English documentation
├── README_KO.md # Korean documentation
├── poc.py # PoC detection script
├── docker-compose.yml # Container orchestration
├── run-tests.sh # Linux/Mac test runner
├── run-tests.ps1 # Windows test runner
├── vulnerable-app/ # Vulnerable version
│ ├── app.py
│ ├── Dockerfile
│ └── requirements.txt
└── patched-app/ # Fixed version
├── app.py
├── Dockerfile
└── requirements.txt
References¶
- https://github.com/open-reception/appointment-booking-software/commit/8525d35a41c31078d9f01c62e9687e653cf1a494
- https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-5qfr-7q4g-3469
- https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-5qfr-7q4g-3469
Generated by PoC Generator on 2026-08-08T12:19:36.775930402
Frequently asked questions¶
What is CVE-2026-48086?¶
CVE-2026-48086 is a Critical (9.9) vulnerability: OpenReception's appointment booking software provides an end-to-end encrypted appointment…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-48086?¶
Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.
How do I block or mitigate CVE-2026-48086?¶
Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.
For authorized security testing and research only. See the full source and NVD record.