# CVE-2026-7042: 666ghj MiroFish REST API Endpoint __init__.py create_app missing authentication

> Attackers can bypass authentication on the MiroFish REST API endpoint to access protected resources without credentials.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Apr 2026
- **Updated:** 27 Apr 2026
- **Also known as:** GHSA-wr9f-cr47-6784

## What is CVE-2026-7042?

CVE-2026-7042 is a medium-severity missing authorization vulnerability in 666ghj MiroFish, published on 26 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw has been found in 666ghj MiroFish up to 0.1.2. This affects the function create_app of the file backend/app/__init__.py of the component REST API Endpoint. Executing a manipulation can lead to missing authentication. It is possible to launch the attack remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-306 (Missing Authentication for Critical Functionality), CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-7042?


## How do I fix CVE-2026-7042?

No fix has been published for CVE-2026-7042 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-7042 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-7042 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-7042 and fix it if it is affected.

What it is: CVE-2026-7042 is a medium-severity missing authorization vulnerability in 666ghj MiroFish, published on 26 Apr 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-2026-7042 exists.

Affected product: 666ghj MiroFish. 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-2026-7042/ (Markdown: https://insights.sbomify.com/CVE-2026-7042/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-7042
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7042
- OSV: https://osv.dev/vulnerability/CVE-2026-7042

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-7042/
Summaries are generated and may contain mistakes; the official description above is the record.