High severity · published Apr 6, 2026
CVE-2026-5708
Improper Control of User-Modifiable Attributes in RES CreateSession API
8.8
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
Research and Engineering Studio (RES) · AWS
2023.11 through 2025.12.01 · source: vendor
RA
Research And Engineering Studio · Amazon
before 2026.03 · source: NVD
Affected product
RA
Research and Engineering Studio (RES)
AWS
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5708
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5708
Vendor Advisory
https://aws.amazon.com/security/security-bulletins/2026-014-aws/
Exploit
https://github.com/aws/res/issues/149
Release Notes
https://github.com/aws/res/releases/tag/2026.03
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