# CVE-2026-5709: AWS Research and Engineering Studio (RES) FileBrowser Command Injection

> Remote authenticated attackers can execute arbitrary commands on cluster-manager instances via unsanitized input in the FileBrowser API.

- **Severity:** High 7.7 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **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:** 6 Apr 2026
- **Updated:** 7 Apr 2026
- **Also known as:** GHSA-6vq3-2fhj-j6wx

## What is CVE-2026-5709?

CVE-2026-5709 is a high-severity command injection vulnerability in AWS Research and Engineering Studio (RES), published on 6 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Unsanitized input in the FileBrowser API in AWS Research and Engineering Studio (RES) version 2024.10 through 2025.12.01 might allow a remote authenticated actor to execute arbitrary commands on the cluster-manager EC2 instance via crafted input when using the FileBrowser functionality.

To remediate this issue, users are advised to upgrade to RES version 2026.03 or apply the corresponding mitigation patch to their existing environment.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-5709?

It affects 1 product.


Products: Amazon Research and Engineering Studio.

## How do I fix CVE-2026-5709?

No fix has been published for CVE-2026-5709 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-5709 being exploited?

There is no known exploitation of CVE-2026-5709 in the wild and no public exploit code.

## Other vulnerabilities in AWS Research and Engineering Studio (RES)

- [CVE-2026-5707](https://insights.sbomify.com/CVE-2026-5707/): Command Injection via Virtual Desktop Session Name in AWS Research and Engineering Studio (RES) (high 8.7)
- [CVE-2026-5708](https://insights.sbomify.com/CVE-2026-5708/): Improper Control of User-Modifiable Attributes in RES CreateSession API (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-5709 and fix it if it is affected.

What it is: CVE-2026-5709 is a high-severity command injection vulnerability in AWS Research and Engineering Studio (RES), published on 6 Apr 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-2026-5709 in the wild and no public exploit code.

Affected product: AWS Research and Engineering Studio (RES). 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-2026-5709/ (Markdown: https://insights.sbomify.com/CVE-2026-5709/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-5709
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-5709
- OSV: https://osv.dev/vulnerability/CVE-2026-5709

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-5709/
Summaries are generated and may contain mistakes; the official description above is the record.