# CVE-2026-9306: QuantumNous new-api Midjourney Image Relay Endpoint relay-router.go GetByOnlyMJId authorization

> Attackers can bypass authorization checks in the Midjourney image relay endpoint to access protected resources remotely.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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:** 23 May 2026
- **Updated:** 26 May 2026
- **Also known as:** GHSA-cgrh-9fc9-55f9

## What is CVE-2026-9306?

CVE-2026-9306 is a medium-severity missing authorization vulnerability in QuantumNous new-api, published on 23 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A security vulnerability has been detected in QuantumNous new-api up to 0.12.1. This affects the function RelayMidjourneyImage/GetByOnlyMJId of the file router/relay-router.go of the component Midjourney Image Relay Endpoint. Such manipulation leads to authorization bypass. The attack can be launched remotely. The attack requires a high level of complexity. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-9306?


## How do I fix CVE-2026-9306?

No fix has been published for CVE-2026-9306 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-9306 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9306 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-9306 and fix it if it is affected.

What it is: CVE-2026-9306 is a medium-severity missing authorization vulnerability in QuantumNous new-api, published on 23 May 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-2026-9306 exists.

Affected product: QuantumNous new-api. 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-2026-9306/ (Markdown: https://insights.sbomify.com/CVE-2026-9306/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-9306
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9306
- OSV: https://osv.dev/vulnerability/CVE-2026-9306

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-9306/
Summaries are generated and may contain mistakes; the official description above is the record.