# CVE-2026-65825: OpenReception: one tenant's throttle row disables the PIN brute-force throttle for the same identifier in other tenants


- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 23 Oct 2026
- **Updated:** 26 Oct 2026
- **Also known as:** GHSA-v4q4-xmqf-gmq8

## What is CVE-2026-65825?

CVE-2026-65825 is a high-severity vulnerability in open-reception appointment-booking-software, published on 23 Oct 2026. 

### Official description

OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. In versions 2.1.0 and prior, a returning client's six-digit booking PIN can be brute-forced online in the victim tenant. A successful guess yields the client's booking access token, granting access to that client's appointment tunnel, which holds their end-to-end-encrypted appointment data, and the ability to act as the client, for example adding or cancelling appointments in the tunnel. The bypass is cross-tenant: state owned by one tenant removes an authentication protection of a different tenant. This crossing of the tenant boundary is the basis for the scope-changed vector. At time of publication, there are no publicly available patches.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2026-65825?


## How do I fix CVE-2026-65825?

No fix has been published for CVE-2026-65825 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-65825 being exploited?

There is no known exploitation of CVE-2026-65825 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-65825 and fix it if it is affected.

What it is: CVE-2026-65825 is a high-severity vulnerability in open-reception appointment-booking-software, published on 23 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-65825 in the wild and no public exploit code.

Affected product: open-reception appointment-booking-software. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-65825/ (Markdown: https://insights.sbomify.com/CVE-2026-65825/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-65825
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-65825
- OSV: https://osv.dev/vulnerability/CVE-2026-65825

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-65825/
Summaries are generated and may contain mistakes; the official description above is the record.