Vulnerability · Published Apr 6, 2026 · Assigned by AMZN

CVE-2026-5708Improper Control of User-Modifiable Attributes in RES CreateSession API

High 8.8

In plain English

A high-severity security flaw in Research and Engineering Studio (RES) from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 58% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.9%top 41.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Unsanitized control of user-modifiable attributes in the session creation component in AWS Research and Engineering Studio (RES) prior to version 2026.03 could allow an authenticated remote user to escalate privileges, assume the virtual desktop host instance profile permissions, and interact with AWS resources and services via a crafted API request. To remediate this issue, users are advised to upgrade to RES version 2026.03 or apply the corresponding mitigation patch to their existing environment.

Affected products (as reported)

Vendor	Product	Versions
AWS	Research and Engineering Studio (RES)	2023.11 – through 2025.12.01

Weakness: CWE-915 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/aws/res/releases/tag/2026.03 release-notes
https://github.com/aws/res/issues/149 patch
https://aws.amazon.com/security/security-bulletins/2026-014-aws/ vendor-advisory