AWS Patches Critical RCE and Privilege Escalation in Nimble Studio

Key Takeaways

• AWS has addressed three critical vulnerabilities in its Research and Engineering Studio (RES).
• The flaws, including CVE-2026-5707, CVE-2026-5708, and CVE-2026-5709, allow authenticated attackers to achieve root-level command execution and privilege escalation.
• Affected RES versions include 2025.12.01 and earlier.
• A patch is available in RES version 2026.03, and immediate upgrades or workarounds are strongly recommended.

Amazon Web Services (AWS) has released an urgent security bulletin addressing a trio of severe vulnerabilities within its Research and Engineering Studio (RES) platform. These security flaws could enable authenticated malicious actors to execute arbitrary commands with root privileges and escalate their access within targeted cloud environments.

AWS Research and Engineering Studio functions as an open-source web portal, providing administrators with tools to establish, manage, and scale secure cloud-based research and engineering environments. Given that these environments frequently process highly sensitive data, AWS is urging administrators to implement the necessary patches without delay.

Vulnerability Details

The recently published security bulletin (2026-014-AWS) details three distinct vulnerabilities impacting RES versions 2025.12.01 and earlier. While exploiting these flaws necessitates prior authenticated access to the system, they present substantial pathways for network compromise.

CVE-2026-5707: OS Command Injection via Virtual Desktop Session Names

This vulnerability arises from inadequate input sanitization in how RES processes virtual desktop session names. An attacker can exploit this OS command injection flaw by crafting a malicious session name, potentially executing arbitrary commands with root privileges directly on the virtual desktop host. This issue affects RES versions 2025.03 through 2025.12.01.

CVE-2026-5708: Privilege Escalation via User-Modifiable Attributes

This flaw involves improper control over user-modifiable attributes during the session creation process. By sending a carefully constructed API request, a remote authenticated user can escalate their privileges to assume the Virtual Desktop Host instance profile. This grants the attacker unauthorized access to other linked AWS resources and services. This vulnerability impacts all RES versions prior to 2026.03.

CVE-2026-5709: OS Command Injection in FileBrowser API

Similar to the first vulnerability, CVE-2026-5709 is an OS command injection flaw found within the platform’s FileBrowser API. Malicious input submitted through the FileBrowser functionality allows an attacker to execute arbitrary commands on the critical cluster-manager EC2 instance. This issue affects RES versions 2024.10 through 2025.12.01.

Security Impact and Remediation

Unpatched, these vulnerabilities offer threat actors a clear path to compromise virtual desktop hosts, seize control of the cluster manager, and pivot to other sensitive AWS resources. Successful exploitation could lead to significant data breaches, complete system hijacking, or severe operational disruptions.

AWS has officially resolved these issues in RES version 2026.03. Security teams and system administrators are strongly advised to upgrade their cloud environments to this latest version as quickly as possible. Organizations utilizing forked or derivative codebases must ensure these new fixes are merged into their custom deployments to mitigate ongoing exposure.

For teams unable to perform an immediate full upgrade, AWS has provided manual workarounds. Administrators can apply specific patches to their existing environments by following the mitigation instructions published on the official AWS RES GitHub repository. These manual fixes specifically address the command injection and privilege escalation vectors, securing the platform until a complete version upgrade can be implemented.

What You Should Do

• Immediately upgrade all AWS Research and Engineering Studio (RES) deployments to version 2026.03.
• If an immediate upgrade is not feasible, apply the specific manual mitigation patches detailed in the official AWS RES GitHub repository.
• Organizations using custom or forked RES codebases must integrate these security fixes into their deployments.
• Regularly monitor AWS security bulletins and advisories for updates on critical vulnerabilities.

Disclaimer: HackersRadar reports on cybersecurity threats and incidents for informational and awareness purposes only. We do not engage in hacking activities, data exfiltration, or the hosting or distribution of stolen or leaked information. All content is based on publicly available sources.