CVE-2026-22611 LOW

CVE-2026-22611: AWS SDK for .NET V4 adopted defense in depth enhancement for region parameter value

Vendor Aws
Product aws-sdk-net
Weakness CWE-20 · Input validation
Published January 10, 2026
Last update January 12, 2026
View on NVD All CVEs

CVSS base score

3.7/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

AWS SDK for .NET works with Amazon Web Services to help build scalable solutions with Amazon S3, Amazon DynamoDB, Amazon Glacier, and more. From versions 4.0.0 to before 4.0.3.3, Customer applications could be configured to improperly route AWS API calls to non-existent or non-AWS hosts. This notification is related to the use of specific values for the region input field when calling AWS services. An actor with access to the environment in which the SDK is used could set the region input field to an invalid value. This issue has been patched in version 4.0.3.3.

Key dates

02Disclosure timeline

January 10, 2026 CVE published
January 12, 2026 Record updated