# CVE-2026-7638: Missing authorization in App Builder – Create Native Android & iOS Apps On The Flight

> Authenticated attackers can modify any user's avatar by manipulating the user_id parameter due to missing authorization checks in the App Builder plugin.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 May 2026
- **Updated:** 4 May 2026
- **Also known as:** GHSA-5rjg-2j76-x2r5

## What is CVE-2026-7638?

CVE-2026-7638 is a medium-severity missing authorization vulnerability in appcheap App Builder – Create Native Android & iOS Apps On The Flight, published on 2 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The App Builder – Create Native Android & iOS Apps On The Flight plugin for WordPress is vulnerable to Insecure Direct Object Reference  in all versions up to and including 5.6.0. This is due to missing authorization validation in the `upload_avatar()` function, which accepts an attacker-controlled `user_id` parameter from the POST request body and uses it to update user meta without verifying that the authenticated requester owns or has permission to modify the target account. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite the profile avatar of any arbitrary user on the site, including administrators, by supplying a target `user_id` in the request body to the `/wp-json/app-builder/v1/upload-avatar` endpoint.

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

## Which versions are affected by CVE-2026-7638?


## How do I fix CVE-2026-7638?

No fix has been published for CVE-2026-7638 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-7638 being exploited?

There is no known exploitation of CVE-2026-7638 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7638 and fix it if it is affected.

What it is: CVE-2026-7638 is a medium-severity missing authorization vulnerability in appcheap App Builder – Create Native Android & iOS Apps On The Flight, published on 2 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-7638 in the wild and no public exploit code.

Affected product: appcheap App Builder – Create Native Android & iOS Apps On The Flight. 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-2026-7638/ (Markdown: https://insights.sbomify.com/CVE-2026-7638/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7638
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7638
- OSV: https://osv.dev/vulnerability/CVE-2026-7638

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7638/
Summaries are generated and may contain mistakes; the official description above is the record.