HighPublic exploit

OS Command Injection in AWS Research and Engineering Studio FileBrowser API

IdentifiersCVE-2026-5709CWE-78· Improper Neutralization of Special…

CVE-2026-5709 is an OS command injection vulnerability in the FileBrowser API of AWS Research and Engineering Studio (RES). The issue is caused by unsanitized input handling in RES versions 2024.10 through 2025.12.01. A remote authenticated attacker can supply crafted input through FileBrowser functionality and trigger arbitrary command execution on the cluster-manager EC2 instance.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows arbitrary command execution on the cluster-manager EC2 instance. Based on the provided context and CVSS vectors, this can result in high-impact compromise of confidentiality, integrity, and availability, including takeover of the cluster-manager component, potential access to sensitive data, operational disruption, and possible pivoting to other connected AWS resources depending on the environment.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrade is not possible, apply the manual mitigation patch and follow the mitigation instructions published by AWS for this issue. The provided context indicates AWS published workaround guidance through its official RES GitHub resources to address the command injection vector until a full upgrade to 2026.03 can be completed.

Remediation

Patch, then assume compromise.

Upgrade AWS Research and Engineering Studio (RES) to version 2026.03. For environments that cannot immediately upgrade, apply the corresponding vendor-provided mitigation patch to the existing deployment. Organizations maintaining forked or derivative RES codebases should merge the upstream fixes into their custom deployments.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

Amazon Web ServicesResearch And Engineering Studioapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

8 SOURCESView more in app

cyber security newsNews

Apr 10, 2026

AWS Patches Critical RCE and Escalate Privileges in Research and Engineering Studio

An OS command injection vulnerability in the AWS Research and Engineering Studio (RES) FileBrowser API that allows an authenticated attacker to execute arbitrary commands on the cluster-manager EC2 instance.

cvefeed high severityNews

Apr 6, 2026

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

A command injection vulnerability in the FileBrowser API of AWS Research and Engineering Studio (RES) that could allow a remote authenticated actor to execute arbitrary commands on the cluster-manager EC2 instance.

What this page doesn’t show

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity5