# CVE-2026-108758: Easy!Appointments through 1.6.0 Authorization Bypass via booking/register Endpoint

> Unauthenticated attackers can modify any appointment and gain management access by bypassing authorization checks in the booking registration endpoint.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-q8ph-7hq3-m5wq

## What is CVE-2026-108758?

CVE-2026-108758 is a high-severity missing authorization vulnerability in alextselegidis easyappointments, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Easy!Appointments through 1.6.0 contains an authorization bypass vulnerability in Booking::register() that allows unauthenticated attackers to modify any appointment by supplying an appointment id without its hash. Attackers can enumerate sequential appointment ids with a self-asserted manage_mode flag to rewrite appointment details, rebind them to attacker-controlled customers, and obtain management hashes for rescheduling or cancellation.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-108758?


## How do I fix CVE-2026-108758?

No fix has been published for CVE-2026-108758 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108758 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108758 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108758 and fix it if it is affected.

What it is: CVE-2026-108758 is a high-severity missing authorization vulnerability in alextselegidis easyappointments, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108758 exists.

Affected product: alextselegidis easyappointments. 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-2026-108758/ (Markdown: https://insights.sbomify.com/CVE-2026-108758/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108758
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108758
- OSV: https://osv.dev/vulnerability/CVE-2026-108758

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-108758/
Summaries are generated and may contain mistakes; the official description above is the record.