Low, CVSS 3.7npmAmendedPublished
AWS SDK for JavaScript v3 adopted defense in depth enhancement for region parameter value
GHSA-6475-r3vj-m8vf
- Affected
- npm @smithy/config-resolver < 4.4.0
- Fixed in
- 4.4.0· Vendor fix available
- Issue
- CVSSv3.1 Rating: 3.7 (LOW) Summary 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. A defense-in-depth enhancement has been implemented in the AWS SDK for JavaScript v3 (versions 3.723.0 and later). This enhancement validates that a region used to construct an endpoint URL is a valid host label. The change was released on November 15, 2025. This advisory is informational to help customers understand their responsibilities regarding configuration security. Impact Customer applications could be configured to improperly route AWS API calls to non-existent or non-AWS hosts. While the SDK was functioning as designed, additional safeguards have been added to support secure customer implementations. Impacted versions: @smithy/config-resolver <4.4.0 Patches On November 15, 2025, an enhancement was made to the…
Recommended action: Upgrade to 4.4.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.