# CVE-2026-10269: decolua 9router HTTP Header dashboardGuard.js isAuthenticated improper authorization

> Attackers can bypass authentication in the 9router dashboard by manipulating the Host header, gaining unauthorized access to protected resources.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jun 2026
- **Updated:** 1 Jun 2026
- **Also known as:** GHSA-rj93-2986-gmf9

## What is CVE-2026-10269?

CVE-2026-10269 is a medium-severity missing authorization vulnerability in decolua 9router, published on 1 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security vulnerability has been detected in decolua 9router up to 0.4.0. This issue affects the function isAuthenticated of the file src/dashboardGuard.js of the component HTTP Header Handler. The manipulation of the argument Host leads to improper authorization. The attack is possible to be carried out remotely. Upgrading to version 0.4.1 is capable of addressing this issue. The identifier of the patch is 428e2c045cb9c0eb8080e8b580471a9c2eaa95ca. Upgrading the affected component is recommended.

Weakness: CWE-285 (Improper Authorization), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2026-10269?


## How do I fix CVE-2026-10269?

No fix has been published for CVE-2026-10269 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-10269 being exploited?

There is no known exploitation of CVE-2026-10269 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-10269 and fix it if it is affected.

What it is: CVE-2026-10269 is a medium-severity missing authorization vulnerability in decolua 9router, published on 1 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-10269 in the wild and no public exploit code.

Affected product: decolua 9router. 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-2026-10269/ (Markdown: https://insights.sbomify.com/CVE-2026-10269/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-10269
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-10269
- OSV: https://osv.dev/vulnerability/CVE-2026-10269

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-10269/
Summaries are generated and may contain mistakes; the official description above is the record.